Cyclopentene supplier | CasNO.142-29-0

Name
Cyclopentene
EINECS 205-532-9
CAS No. 142-29-0
Article Data296
CAS DataBase
Density 0.831 g/cm³
Solubility immiscible with water
Melting Point -135 °C
Formula C₅H₈
Boiling Point 44.2 °C at 760 mmHg
Molecular Weight 68.1185
Flash Point <−30°F
Transport Information UN 2246 3/PG 2
Appearance colourless liquid with a petrol-like odour
Safety 9-16-26-33-36-62-61-36/37
Risk Codes 11-21/22-36/37/38-65-67-52/53
Molecular Structure
Hazard Symbols F,Xn
Synonyms NSC5160;
PSA 0.00000
LogP 1.72650

Synthetic route

: 285-67-6
Cyclopentene oxide

: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With sodium amalgam; chiral Co(II) In tetrahydrofuran-d8 at 20℃; for 6h; deoxygenation;	100%
With triphenylphosphine at 200℃; for 8.5h;	59%
With trifluoroacetic acid; selenobenzamide In dichloromethane at 20℃; for 30h; Mechanism; With other reagents are dicussed.;	85 % Chromat.

: 5-Cyclopentyloxy-thianthren-5-ium; perchlorate

A: 137-43-9
Cyclopentyl bromide

B: 2362-50-7
thianthrene-5-oxide

C: 142-29-0
cyclopentene

D: 92-85-3
Thianthrene

Conditions

Conditions	Yield
With 18-crown-6 ether; potassium bromide Product distribution; Substitution; elimination;	A 89% B 100% C 1.5% D 3.5%

...Expand

: 542-92-7
cyclopenta-1,3-diene

: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With hydrogen; palladium In methanol at 30℃; under 760 Torr; Rate constant; Product distribution; Thermodynamic data; mechanism of reaction, var. solvents, var. amount of catalyst, var. catalysts, var. conc., var. pressure, eq. constants, activation energy;	97.1%
With hydrogen; Ruthenium deposition on Pd/Cu at 199.9℃; Rate constant; effect of catalyst content on the rate on the yield;	3%
With hydrogen; ruthenium at 49.9℃; under 140 Torr; Product distribution; variation of temperature;

: 77861-36-0
C17H17N3O8S2

A: 4009-06-7
(4-nitro-N-((4-nitrophenyl)sulfonyl)benzenesulfonamide)

B: 142-29-0
cyclopentene

Conditions

Conditions	Yield
In neat (no solvent) at 175℃; for 0.5h;	A 95% B 90%

: 77-73-6, 933-60-8, 1755-01-7
bi(cyclopentadiene)

: 79885-00-0
tetrahydroindene

: 142-29-0
cyclopentene

Conditions

Conditions	Yield
tert-butylhydroquinone In diphenylether at 215℃; for 2.58333h; Product distribution / selectivity;	94.19%

: 1003-03-8
Cyclopentamine

: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With nickel(II) oxide; 1-methyl-2-nitrobenzene; oxalic acid at 280 - 310℃; for 3.16667h; Temperature;	92%
With 5,6,8,9-tetrahydro-7-phenyldibenzoxanthenylium tetrafluoroborate In dichloromethane at 20℃; for 27h;

: 5057-98-7
cis-1,2-cyclopentanediol

: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With formic acid at 20 - 240℃; Inert atmosphere;	86%

: (Z)-5-bromo-1-iodo-1-pentene

: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With n-butyllithium In diethyl ether; pentane 1.) -78 deg C; 2.) 25 deg C over 1 h;	85%
With n-butyllithium	85%

: 693-86-7
ethenylcyclopropane

: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With [i-PrNDI]Ni2(C6H6); 1,3,5-trimethyl-benzene In benzene for 24h; Reagent/catalyst; Inert atmosphere; Glovebox; regioselective reaction;	83%
at 526.9℃; Rate constant; pyrolysis, other temperature;
at 341.2℃; under 485 - 500 Torr; Rate constant; Mechanism;
at 303.9 - 780.9℃; Kinetics;

: 112-17-4
n-decyl acetate

A: 592-41-6
1-hexene

B: 872-05-9
1-Decene

C: 822-50-4, 1192-18-3, 13012-46-9, 134932-08-4, 2452-99-5
1,2-dimethylcyclopentane

D: 2511-92-4
1-Butyl-2-methylcyclopropane

E: 41977-37-1
1-Methyl-2-pentylcyclopropane

F: 142-29-0
cyclopentene

Conditions

Conditions	Yield
at 495℃; for 0.00727778h; Rate constant; Product distribution; various temp., also in toluene, also with 14C-labelled ester;	A 1.03% B 81.3% C 1.91% D 1.2% E 0.497% F 0.45%

...Expand

: 96-41-3
Cyclopentanol

A: 930-28-9
cyclopentyl chloride

B: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With 1-chloro-1-(dimethylamino)-2-methyl-1-propene In dichloromethane 1.) 0 deg C; 2.) rt., 3h;	A 80% B n/a
With 1-chloro-1-(dimethylamino)-2-methyl-1-propene In dichloromethane 1.) 0 deg C; 2.)rt., 3h;
With bismuth(III) chloride In tetrachloromethane for 1.5h; Heating;

: 580-35-8
2,4,6-triphenylpyridine

: 1-cyclopentyl-2,4,6-triphenylpyridin-1-ium tetrafluoroborate salt

: 142-29-0
cyclopentene

Conditions

Conditions	Yield
at 178℃; under 200 Torr; Mechanism;	78%

: 5-Cyclopentyloxy-thianthren-5-ium; perchlorate

A: 2362-50-7
thianthrene-5-oxide

B: 1556-18-9
cyclopentyl iodide

C: 142-29-0
cyclopentene

D: 92-85-3
Thianthrene

Conditions

Conditions	Yield
With potassium iodide In acetonitrile for 2h; Product distribution; Substitution; elimination;	A 78% B 55% C 21% D 19%

...Expand

: 111-24-0
1,5-dibromo-pentane

: Cp*Mo(NO)(κ2-1,2-bis(dimethylphosphino)ethane)

A: [Mo(NO)(Br)2(1,2-bis(dimethylphosphino)ethane)]2

B: 142-29-0
cyclopentene

C: 109-68-2
2-pentene

Conditions

Conditions	Yield
In tetrahydrofuran at 70℃; for 72h; Glovebox;	A 75% B n/a C n/a

...Expand

: 797056-11-2
1,3-dibromocyclopentane

A: 185-94-4
bicyclo[2.1.0]pentane

B: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With tetra-n-propylammonium bromide In N,N-dimethyl-formamide electrolytic reduction: platinum electrodes; reference: Ag wire. cathode and anode separated by a membrane;	A 71% B 15%

: 87563-16-4
2-(cyclopentyloxy)tropone

A: 533-75-5
2-hydroxy-2,4,6-cycloheptatrien-1-one

B: 142-29-0
cyclopentene

Conditions

Conditions	Yield
In dimethylsulfoxide-d6 at 180℃; for 2h;	A n/a B 70%
In dimethyl sulfoxide at 180℃; for 8h;

: 504-60-9
penta-1,3-diene

A: 542-92-7
cyclopenta-1,3-diene

B: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With hydrogen sulfide at 600℃;	A 12% B 59%
With silica-supported tetrakis(triphenylphosphite)platinum(0)-derived nanocatalyst In benzene at 600℃;	A 58.1% B 2.2%

: 504-60-9
penta-1,3-diene

A: 287-92-3
Cyclopentane

B: 542-92-7
cyclopenta-1,3-diene

C: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With silica-supported tetrakis(triphenylphosphine)platinum(0)-derived nanocatalyst In benzene at 600℃;	A 0.1% B 53.6% C 4.7%

...Expand

: 137-43-9
Cyclopentyl bromide

A: 287-92-3
Cyclopentane

B: 1636-39-1
bicyclopentyl

C: 142-29-0
cyclopentene

D: 33240-34-5
cyclopentylmagnesium bromide

Conditions

Conditions	Yield
With magnesium In diethyl ether at 0℃; Mechanism; Rate constant; reaction rate dependence on angular velocity of disk, solution viscosity;	A 13 % Chromat. B 21 % Chromat. C 13 % Chromat. D 50%

...Expand

: 930-28-9
cyclopentyl chloride

: 7789-20-0
water-d2

A: 55980-41-1
monodeuterocyclopentane

B: 142-29-0
cyclopentene

Conditions

Conditions	Yield
Stage #1: cyclopentyl chloride With magnesium In tetrahydrofuran for 1h; Reflux; Inert atmosphere; Stage #2: water-d2 In tetrahydrofuran at 0℃; Inert atmosphere;	A 50% B n/a

...Expand

: 109-66-0
pentane

A: 78-78-4
methylbutane

B: 110-54-3
hexane

C: 287-92-3
Cyclopentane

D: 542-92-7
cyclopenta-1,3-diene

E: 142-29-0
cyclopentene

F: 71-43-2
benzene

G C1-C4: C1-C4

Conditions

Conditions	Yield
With hydrogen; Platinum-copper at 334.9℃; Product distribution; various temp. and percent Pt;	A 1% B n/a C 49.2% D 25.9% E 15.1% F n/a G n/a

...Expand

: 33240-34-5
cyclopentylmagnesium bromide

A: 287-92-3
Cyclopentane

B: 1636-39-1
bicyclopentyl

C: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With copper dichloride In diethyl ether at 0℃;	A 46% B 1% C 42%

...Expand

: 3400-45-1
cyclopentanecarboxylic acid

A: 287-92-3
Cyclopentane

B: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With hydrogen; silica gel; palladium at 330℃;	A n/a B 45%
With hydrogen; silica gel; palladium at 330℃;	A 40% B n/a

: 134312-49-5
endo-1,4-Dimethyl-2,3,9-trioxatricyclo<4.2.1.15,8>decane

A: 20521-56-6
1-(cyclopent-3-en-1-yl)ethanone

B: 61764-97-4
cis-1,3-Diacetylcyclopentane

C: 108-24-7
acetic anhydride

D: 64-19-7
acetic acid

E: 142-29-0
cyclopentene

Conditions

Conditions	Yield
In chloroform-d1 at 55℃; for 40h; Mechanism;	A 28% B 32% C 4% D 33% E 2%
In pentane at -20℃; for 7.5h; Mechanism; Irradiation;	A 23% B 8% C 4% D 25% E 3%

...Expand

: 5057-98-7
cis-1,2-cyclopentanediol

A: 287-92-3
Cyclopentane

: 5057-99-8
trans-cyclopentane-1,2-diol

C: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With hydrogen In 1,4-dioxane at 139.84℃; under 60006 Torr; for 24h;	A 32% B 11% C 6%

...Expand

: 285-67-6
Cyclopentene oxide

A: 96-41-3
Cyclopentanol

B: 109431-72-3
(+)-(R)-2-cyclopentene-1-ol

C: 6426-28-4
(-)-(S)-2-cyclopenten-1-ol

D: 120-92-3
cyclopentanone

E: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With ammonium chloride; hydroxocobalamine hydrochloride; zinc In methanol for 96h; Product distribution; Equilibrium constant; Kinetics; Ambient temperature; dark, isomerization, different solvents (also deuterated ones), different temperatures, ΔH(excit.), ΔS(excit.);	A 0.5% B n/a C n/a D 5.5% E 30%

...Expand

: 115-11-7
isobutene

A: 106-98-9
1-butylene

B: 590-18-1
(Z)-2-Butene

C: 513-35-9
2-methyl-but-2-ene

D: 1574-41-0
Z-piperylene

E: 2004-70-8
1-methylbuta-1,3-diene

F: 187737-37-7
propene

G: 34557-54-5
methane

H: 624-64-6
trans-2-Butene

I: 627-20-3
(Z)-pent-2-ene

J: 646-04-8
(E)-pent-2-ene

K: 74-84-0
ethane

L: 74-98-6
propane

M: 75-28-5
Isobutane

N: 78-78-4
methylbutane

O: 74-85-1
ethene

P: 109-67-1
1-penten

Q: 287-92-3
Cyclopentane

R: 563-46-2
2-Methyl-1-butene

S: 563-45-1
3-Methyl-1-butene

T: 142-29-0
cyclopentene

U: 106-97-8
n-butane

V: 109-66-0
pentane

Conditions

Conditions	Yield
CBV1502 at 579.84℃; under 900.09 Torr; Product distribution / selectivity;	A 2.6% B 2.4% C 1.29% D 0.05% E 0.03% F 24.95% G 0.73% H 3.19% I 0.32% J 0.58% K 0.36% L 2.08% M 2.15% N 0.34% O 9.61% P 0.23% Q 0.4% R 0.71% S 0.14% T 0.14% U 1.8% V 0.16%
CBV28014 at 509.84℃; under 900.09 Torr; Product distribution / selectivity;	A 6.71% B 7.3% C 5.62% D 0.02% E 0.03% F 23.29% G 0.09% H 9.97% I 1.1% J 2.06% K 0.07% L 1.24% M 1.95% N 0.59% O 3.25% P 0.7% Q 0.31% R 2.72% S 0.47% T 0.21% U 1.37% V 0.26%

...Expand

: 109-66-0
pentane

A: 287-92-3
Cyclopentane

B: 542-92-7
cyclopenta-1,3-diene

C: 142-29-0
cyclopentene

Conditions

Conditions	Yield
With silica-supported tetrakis(triphenylphosphine)platinum(0)-derived nanocatalyst In benzene at 600℃;	A 0.3% B 21.4% C 2.7%
With silica-supported tetrakis(triphenylphosphite)platinum(0)-derived nanocatalyst In benzene at 600℃;	A 2.1% B 6% C 1.2%
With platinum on alumina In water at 600℃;	A 0.1% B 1.4% C 0.1%
With hydrogen at 575℃; under 3087.28 Torr; for 15h; Overall yield = 32 percent;

...Expand

: 591-93-5
1,4-Pentadiene

A: 2004-70-8
1-methylbuta-1,3-diene

B: 693-86-7
ethenylcyclopropane

C: 542-92-7
cyclopenta-1,3-diene

D: 106-99-0
buta-1,3-diene

E: 142-29-0
cyclopentene

Conditions

Conditions	Yield
Product distribution; Mechanism; Plasmolysis (40 W, 3.48mmol/min, 13.56 MHz);	A n/a B 5% C 21% D n/a E 18%

...Expand

: 142-29-0
cyclopentene

: 285-67-6
Cyclopentene oxide

Conditions

Conditions	Yield
With [NiII(tetrakis(2,6-di(n-butoxy)phenyl)porphyrinato)]; 3-chloro-benzenecarboperoxoic acid In dichloromethane at 20℃; for 0.166667h; Inert atmosphere; Schlenk technique;	100%
With dihydrogen peroxide; teterabutylammonium In acetonitrile at 31.85℃; for 3h;	99%
With tert.-butylhydroperoxide In acetonitrile at 65 - 68℃; for 9h;	99%

: 142-29-0
cyclopentene

: 96-41-3
Cyclopentanol

Conditions

Conditions	Yield
With zinc(II) tetrahydroborate; dihydrogen peroxide In acetonitrile for 0.166667h; Mechanism; Ambient temperature;	100%
With zinc(II) tetrahydroborate; dihydrogen peroxide In acetonitrile for 0.166667h; Ambient temperature;	100%
With lithium borohydride; alkaline H2O2; ethyl acetate	94%

: 142-29-0
cyclopentene

: 542-92-7
cyclopenta-1,3-diene

Conditions

Conditions	Yield
With n-butyllithium; potassium 2-methylbutan-2-olate In hexane 1) r.t., 14 h, 2) reflux, 5 h;	100%
at 850℃; Erhitzen unter vermindertem Druck;
With chromium (III)-oxide-aluminium oxide contacts at 450 - 500℃;
With palladium at 180 - 200℃;

: 142-29-0
cyclopentene

: 120-92-3
cyclopentanone

Conditions

Conditions	Yield
With oxygen; palladium(II) sulfate; PdSO4-H3PMo6W6O40 In cyclohexane; water at 30℃; for 6h;	100%
With oxygen; H3PMo6W6O40 In cyclohexane; water at 29.9℃; under 760 Torr; for 6h;	100%
With palladium(II) sulfate; oxygen; H3PMo6W6O40 In cyclohexane; water at 29.9℃; under 760 Torr; for 6h; Product distribution; Rate constant; other time, other Pd(II) salt, other concentration of catalyst;	100%

: 107-19-7
propargyl alcohol

: 142-29-0
cyclopentene

: 80997-78-0
1-Bromo-2-prop-2-ynyloxy-cyclopentane

Conditions

Conditions	Yield
With N-Bromosuccinimide at 0℃; for 1h;	100%
With N-Bromosuccinimide In dichloromethane 1.) -20 deg C, 2 h, 2.) 15 deg C;	70%

: 123-38-6
propionaldehyde

: 142-29-0
cyclopentene

: 6635-67-2
1-cyclopentyl-1-propanone

Conditions

Conditions	Yield
With dibenzoyl peroxide at 90℃; for 10h;	100%

: 6213-87-2
methyl (2E)-3-bromoacrylate

: 142-29-0
cyclopentene

: 119946-66-6
3-Cyclopent-2-en-(Z)-ylidene-propionic acid methyl ester

Conditions

Conditions	Yield
With palladium diacetate; tetrabutyl-ammonium chloride; potassium acetate In N,N-dimethyl-formamide at 25℃; for 24h;	100%

: 142-29-0
cyclopentene

: (+/-)-trans-1-azido-2-iodocyclopentane

Conditions

Conditions	Yield
With sodium azide; Iodine monochloride In acetonitrile 1.) -20 deg C, 30 min; 2.) up to RT, 10 h;	100%
With sodium azide; iodine In tetrahydrofuran; methanol; water at 20 - 25℃; for 3h;	74%

: 142-29-0
cyclopentene

: 155052-20-3
4-Aza-2-oxo-1-oxaspiro<5.4>dec-3-ene 4-oxide

: rel-(5aS,8aR,8bS)-1-oxo-1,5a,8a,8b-tetrahydrocyclopent[f]isoxazolo[2,3-c]oxazole-3-spiro-1'-cyclohexane

Conditions

Conditions	Yield
at 30℃; under 6000480 Torr; for 48h;	100%

: 142-29-0
cyclopentene

: 176504-23-7
(5R,6S,9R)-6-isopropyl-9-methyl-2-oxo-4-aza-1-oxaspiro[5.4]dec-3-ene 4-oxide

: 190077-58-8
(3R,5aR,8aR,8bS,1'R,4'S)-1-oxo-1,5a,8a,8b-tetrahydrocyclopent[f]isoxazolo[2,3-c]oxazole-3-spiro-3'-menthane

Conditions

Conditions	Yield
at 30℃; under 6000480 Torr; for 72h;	100%

: 1384526-43-5
(2,6-(C6H3But)2pyridine)Au(CF3CO2)

: 1109-15-5
tris(pentafluorophenyl)borate

: 142-29-0
cyclopentene

: 1422722-13-1
[(2,6-bis(4-tBuC6H3)2pyridine dianion)Au(eta2-cyclopentene)][CF3COOB(C6F5)4]

Conditions

Conditions	Yield
In dichloromethane-d2 at -78 - -40℃;	100%

...Expand

: 1333-74-0
hydrogen

: 142-29-0
cyclopentene

: 287-92-3
Cyclopentane

Conditions

Conditions	Yield
With C55H88ClN3P2Ru In dichloromethane-d2 at 50℃; under 3040.2 Torr; for 3h; Reagent/catalyst; Time;	100%

: 824-79-3
sodium 4-methylbenzenesulfinate

: 142-29-0
cyclopentene

: C12H15IO2S

Conditions

Conditions	Yield
With iodine In dichloromethane; water at 20℃;	100%

: 142-29-0
cyclopentene

: trans,trans-bis(2-chlorocyclopentyl)selenide

Conditions

Conditions	Yield
With selenium(II) chloride In dichloromethane at -78 - 20℃; for 5h; stereoselective reaction;	100%

: 142-29-0
cyclopentene

: trans,trans-bis(2-bromocyclopentyl)selenide

Conditions

Conditions	Yield
With selenium dibromide In dichloromethane at -78 - 20℃; for 5h; stereoselective reaction;	100%

: 34837-55-3
Phenylselenyl bromide

: 142-29-0
cyclopentene

: 2-bromocyclopentyl phenyl selenide

Conditions

Conditions	Yield
In dichloromethane at 20℃; for 1h;	100%

: (C2H5)2O*(chloro)dihydroborane

: 142-29-0
cyclopentene

: 39105-80-1
(cyclopentyl)dichloroborane

Conditions

Conditions	Yield
In not given	99.5%
In not given	99.5%

: 142-29-0
cyclopentene

: 287-92-3
Cyclopentane

Conditions

Conditions	Yield
With 0.42C23H20N4O42Cl(1-)Zn(2+)10.16H2O0.58Pd(2+)*0.58C23H20N4O4(1-); hydrogen In tetrahydrofuran at 20℃; under 760.051 Torr; for 1h;	99%
With C22H34FeO2Si4; hydrogen In toluene at 20℃; for 6h; Inert atmosphere; Schlenk technique;	99%
With C40H56FeN2Si4(2-); hydrogen In 1,2-dimethoxyethane at 80℃; under 7600.51 Torr; for 2h; Schlenk technique; Autoclave;	99%

: 142-29-0
cyclopentene

: 111-30-8
Glutaraldehyde

Conditions

Conditions	Yield
With 1H-imidazole; sodium periodate; MnCl-TPP-(PEO750)4 In water; acetonitrile at 20℃; for 24h;	99%
With W-MCM41; dihydrogen peroxide In tert-butyl alcohol at 35℃; for 24h;	71%
With sodium periodate; water In 1,2-dichloro-ethane at 20℃; for 1h;	70.9%

: 591-50-4
iodobenzene

: 142-29-0
cyclopentene

: 825-54-7
cyclopent-1-en-1-ylbenzene

Conditions

Conditions	Yield
Stage #1: cyclopentene With bis(1,5-cyclooctadiene)diiridium(I) dichloride; bis(pinacol)diborane at 60℃; for 16h; Inert atmosphere; Stage #2: iodobenzene With palladium diacetate; triphenylphosphine; barium(II) hydroxide In tetrahydrofuran; water at 50℃; for 16h; Suzuki-Miyaura coupling; Inert atmosphere; regioselective reaction;	99%
at 20℃; Irradiation;

: 5159-41-1
2-iodobenzyl alcohol

: 142-29-0
cyclopentene

: 126087-58-9
2-Cyclopent-2-eneylbenzyl alcohol

Conditions

Conditions	Yield
With tetrabutyl-ammonium chloride; potassium acetate; triphenylphosphine; palladium diacetate In N,N-dimethyl-formamide at 80℃; for 24h;	99%

: 16166-61-3
tert-butyl 4-nitrobenzoperoxoate

: 142-29-0
cyclopentene

: 21985-86-4
cyclopent-2-en-1-yl 4-nitrobenzoate

Conditions

Conditions	Yield
Stage #1: cyclopentene With copper-boron encapsulated with (3-aminopropyl)trimethoxysilane grafted SBA-15 In acetonitrile at 25℃; for 0.5h; Stage #2: tert-butyl 4-nitrobenzoperoxoate In acetonitrile at 25℃; for 50h; Reagent/catalyst;	99%
With copper(I) triflate In acetonitrile at 20℃; for 13h; Reagent/catalyst; Sealed tube; Schlenk technique; Inert atmosphere;	90%
With Cu(CH3CN)4PF6 immobilized on halloysite, functionalized with ionic liquid and 2-aminopyrimidine In acetonitrile at 25℃; for 45h; Inert atmosphere;	67%
copper(I) bromide In acetonitrile at 45℃; for 72h; Oxidation;	54%

: 20594-92-7
3,5-diphenyl-1,2,4-oxadiazole-4-oxide

: 142-29-0
cyclopentene

: N-(cyclopent-2-en-1-yl)-N-hydroxybenzamide

Conditions

Conditions	Yield
In methanol Irradiation;	99%
In methanol at 20℃; for 5h; Irradiation;	94%

: 78-94-4
methyl vinyl ketone

: 142-29-0
cyclopentene

: 136202-50-1
(3E,8E)-undeca-3,8-diene-2,10-dione

Conditions

Conditions	Yield
With copper(l) iodide; C39H52Cl2N2O3Ru In diethyl ether at 35℃; for 16h; Cross Metathesis; Inert atmosphere;	99%
Hoveyda-Grubbs catalyst second generation In dichloromethane at 45℃; for 6h;	86%

: 7648-30-8
ethyl 2,2-difluoro-2-iodoacetate

: 142-29-0
cyclopentene

: trans-ethyl-α,α-difluoro-(2-iodocyclopentanyl)acetate

Conditions

Conditions	Yield
With diethylzinc In hexane; acetonitrile at -20℃; for 16h; Schlenk technique; Inert atmosphere;	99%
With sodium dithionite; sodium hydrogencarbonate In acetonitrile at 20℃; for 6h;	75%

: 898555-43-6
(1R,2S,7R,8S)-1,11,11-Trimethyl-6-oxy-3-oxa-6-aza-tricyclo[6.2.1.02,7]undec-5-en-4-one

: 142-29-0
cyclopentene

: 898555-47-0
C17H25NO3

Conditions

Conditions	Yield
In toluene at 30℃; for 46h;	99%

: 898555-33-4
(1S,2R,7S,8R)-8,11,11-Trimethyl-6-oxy-3-oxa-6-aza-tricyclo[6.2.1.02,7]undec-5-en-4-one

: 142-29-0
cyclopentene

: C17H25NO3

Conditions

Conditions	Yield
In toluene at 30℃; for 25h;	99%

: 201230-82-2
carbon monoxide

: 100-63-0
phenylhydrazine

: 142-29-0
cyclopentene

: 104563-25-9
N-cyclopentylmethylene-N'-phenylhydrazine

Conditions

Conditions	Yield
With hydrogen; toluene-4-sulfonic acid; acetylacetonatodicarbonylrhodium(l) In tetrahydrofuran at 100℃; under 52504.2 Torr; for 72h;	99%

...Expand

Cyclopentene Chemical Properties

Product Name: Cyclopentene (CAS NO.142-29-0)

Molecular Formula: C₅H₈
Molecular Weight: 68.117
Index of Refraction: 1.464
Molar Refractivity: 22.66 cm³
Molar Volume: 82 cm³
Surface Tension: 29.7 dyne/cm
Density: 0.83 g/cm³
Enthalpy of Vaporization: 27.63 kJ/mol
Boiling Point: 44.2 °C at 760 mmHg
Vapour Pressure: 378 mmHg at 25°C
Appearance: colorless liquid with a petrol-like odor
XLogP3-AA: 1.9
H-Bond Donor: 0
H-Bond Acceptor: 0
Structure Descriptors of Cyclopentene (CAS NO.142-29-0):
IUPAC Name: cyclopentene
Canonical SMILES: C1CC=CC1
InChI: InChI=1S/C5H8/c1-2-4-5-3-1/h1-2H,3-5H2
InChIKey: LPIQUOYDBNQMRZ-UHFFFAOYSA-N
Product Categories: Pharmaceutical Intermediates; Alkenes; Cyclic; Organic Building Blocks

Cyclopentene Uses

Cyclopentene (CAS NO.142-29-0) is used as a monomer for synthesis of plastics, and in a number of chemical syntheses.

Cyclopentene Production

It can be obtained from vinylcyclopropane in the vinylcyclopropane-cyclopentene rearrangement.

Cyclopentene Toxicity Data With Reference

1.		orl-rat LD50:1656 mg/kg		AIHAAP American Industrial Hygiene Association Journal. 30 (1969),470.
2.		skn-rbt LD50:1231 mg/kg		AIHAAP American Industrial Hygiene Association Journal. 30 (1969),470.

Cyclopentene Consensus Reports

Reported in EPA TSCA Inventory.

Cyclopentene Safety Profile

Moderately toxic by ingestion and skin contact. A very dangerous fire hazard when exposed to flame or heat; can react with oxidizing materials. Keep away from heat and open flame. To fight fire, use foam, CO₂, dry chemical.
Hazard Codes: F, Harmful Xn
Risk Statements: 11-21/22-36/37/38-65-67-52/53
R11:Highly flammable.
R21/22:Harmful in contact with skin and if swallowed.
R36/37/38:Irritating to eyes, respiratory system and skin.
R65:Harmful: may cause lung damage if swallowed.
R67:Vapours may cause drowsiness and dizziness.
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 9-16-26-33-36-62-61-36/37
S9:Keep container in a well-ventilated place.
S16:Keep away from sources of ignition.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S33:Take precautionary measures against static discharges.
S36:Wear suitable protective clothing.
S62:If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label.
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
S36/37:Wear suitable protective clothing and gloves.
RIDADR: UN 2246 3/PG 2
WGK Germany: 3
RTECS: GY5950000
F: 10-23
HazardClass: 3
PackingGroup: II

Cyclopentene Standards and Recommendations

DOT Classification: 3; Label: Flammable Liquid

Cyclopentene Specification

The Cas Register Number of Cyclopentene is 142-29-0 .The chemical synonyms of Cyclopentene (CAS NO.142-29-0) are 3-cyclopentene cyclopentene ; Cyclopentene ; 1-Cyclopentene ; Cyclopent-1-ene .

Product Name

Cyclopentene

Synthetic route

Cyclopentene Chemical Properties

Cyclopentene Uses

Cyclopentene Production

Cyclopentene Toxicity Data With Reference

Cyclopentene Consensus Reports

Cyclopentene Safety Profile

Cyclopentene Standards and Recommendations

Cyclopentene Specification

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