1898-77-7

Basic information

• Product Name: boranylidene(trimethyl)-lambda~5~-phosphane
• Synonyms: NISTC1898777
• CAS NO: 1898-77-7
• Molecular Formula: C₃H₁₂BP
• Molecular Weight: 87.8963
• Mol File: 1898-77-7.mol
• Article Data: 9

Chemical Properties

• CAS DataBase Reference: boranylidene(trimethyl)-lambda~5~-phosphane(CAS DataBase Reference)
• NIST Chemistry Reference: boranylidene(trimethyl)-lambda~5~-phosphane(1898-77-7)
• EPA Substance Registry System: boranylidene(trimethyl)-lambda~5~-phosphane(1898-77-7)

Safety Data

• Hazardous Substances Data: 1898-77-7(Hazardous Substances Data)

Upstream product

• 97012-38-9 trimethylphosphine-triborane adduct 
• 19287-45-7 diborane 
• 18433-84-6 pentaborane⁽¹¹⁾ 
• 39678-68-7 bis(trimethylphosphine)-diborane⁽⁴⁾ 
• 18283-93-7 tetraborane 
• 60-29-7 diethyl ether 
• 594-09-2 trimethylphosphane 
• 97551-46-7 trimethylamine-trimethylphosphine-diborane⁽⁴⁾ 
• 99321-01-4 [tricarbonyl(η5-cyclopentadienyl)tungstenio]diphenylphosphine-borane 
• 186084-09-3 [2,2,2-(PPh₃)2(CO)-nido-2-OsB₄H₇-3-BH₂*PMe₃] 
• 159472-53-4 [Cr(CO)5(η1-BH3(P(CH3)3))] 
• 159472-54-5 [W(CO)5(η1-BH3(P(CH3)3))] 
• 910468-99-4 [(C5H5)Ru(PMe3)2(η1-H3B*PMe3)][B(3,5-C6H3(CF3)2)4] 
• 536-74-3 phenylacetylene 

Downstream Products

• 14044-65-6 borane-THF 
• 19624-22-7 pentaborane⁽⁹⁾ 
• 97012-38-9 trimethylphosphine-triborane adduct 
• 19287-45-7 diborane 
• 13283-31-3 borane 
• 594-09-2 trimethylphosphane 
• 591216-09-0 [(phenyl)2B(CH₂P(methyl)2(BH₃))2][Li(N,N,N',N'-tetramethylethylenediamine)] 
• 566933-64-0 Mn(CO)4(BH₃P(CH₃)3)(P(CH₃)2(C₆H₅))⁽¹⁺⁾*B(C₆H₃(CF₃)2)4^(1-)=[Mn(CO)4(BH₃P(CH₃)3)(P(CH₃)2(C₆H₅))][B(C₆H₃(CF₃)2)4] 
• 566933-67-3 Mn(CO)4(BH₃P(CH₃)3)(P(C₂H₅)3)⁽¹⁺⁾*B(C₆H₃(CF₃)2)4^(1-)=[Mn(CO)4(BH₃P(CH₃)3)(P(C₂H₅)3)][B(C₆H₃(CF₃)2)4] 
• 910468-99-4 [(C5H5)Ru(PMe3)2(η1-H3B*PMe3)][B(3,5-C6H3(CF3)2)4] 
• 910469-01-1 [(C5Me5)Ru(PMe3)2(η1-H3B*PMe3)][B(3,5-C6H3(CF3)2)4] 
• 1189780-31-1 ((CH₃)2C₆H₅Si)CH₂P(BH₃)(CH₃)2 

Relevant articles and documents

Reaction of pentaborane(11) with bis(trimethylphosphine)-diborane(4)

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Tris(2,6-diisopropylphenolato)titanium(IV) dihydridodiorganylborates: Synthesis and structures

The reactions of tris(2,6-diisopropylphenolato)titanium(IV) chloride with alkali-metal dihydridodiorganylborates M(H2BR2) (M = Li, K; R = Me, C6H11, CMe3; BR2 = BC5H10, BC8H14) led to the corresponding titanium dihydridodiorganylborates. However, in almost all cases byproducts such as (2,6-diisopropylphenolato)diorganylboranes, triorganylboranes, diorganylboranes, diborane and tetrakis(2,6- diisopropylphenolato)titanium(IV) were also generated. (2,6-iPr 2C6H3O)3Ti(H2BR 2) compounds also resulted from the interaction of methyltris(2,6-diisopropylphenolato)titanium, for example, with catecholborane. In addition to the formation of tris(2,6-diisopropylphenolato) catecholboratotitanium(IV), B-methylcatecholborane was also formed The reaction of potassium dihydro-9-cyclooctylborate with 2,6-bis(2,2-di-tert-butyl-2- hydroxyethyl)pyridinetitanium dichloride (LTiCl2) led to the complex LTi(H2BC8H14)2. This compound showed no agostic C-H···Ti interaction in contrast to (2,6-iPr2C6H3O)3TiH 2BC8H14 and the corresponding titanium dihydridobis(cyclohexyl)borate.

Coordination compounds of monoborane - Lewis base adducts: Syntheses and structures of [M(CO)5(η1-BH3·L)] (M = Cr, Mo, W; L = NMe3, PMe3, PPh3)

Photolysis of [M(CO)6] (M = Cr, W) in the presence of BH3·L (L = NMe3, PMe3, PPh3) gave isolable borane complexes [M(CO)5(η1-BH3·L)] (1a, M = Cr, L = PMe3; 1b, M = Cr, L = PPh3; 1c, M = Cr, L = NMe3; 2a, M = W, L = PMe3; 2b, M = W, L = PPh3; 2c, M = W, L = NMe3). In products 1 and 2, the monoborane - Lewis base adduct coordinates to the metal center through a B-H-M three-center two-electron bond, which was confirmed by X-ray structural analyses of 1a, 2a, and 2b at low temperature. The X-ray crystal structural analysis of 1c at ambient temperature also showed the same coordination mode, although the positions of hydrogen atoms on the boron were not determined. The 1H NMR spectra of 1 and 2 exhibit only one BH signal at -2 to -3 ppm with an intensity of 3H in the temperature range of -80 °C to room temperature. This indicates that the coordinated BH and terminal BH's are rapidly exchanging in solution even at low temperature. When [Mo(CO)6] was used as a precursor, the formation of the corresponding molybdenum - borane complexes, [Mo(CO)5(η1-BH3·L)] (3a, L = PMe3; 3b, L = PPh3; 3c, L = NMe3), was observed by NMR spectroscopy, but the complexes could not be isolated because of their thermal instability. Complexes of pyridineborane [M(CO)5(η1-BH3·NC5H 5)] (1d, M = Cr; 2d, M = W) were also observable by NMR spectroscopy. Fenske - Hall MO calculations for the model compound [Cr(CO)5(η1-BH3·PH3)] (1e) demonstrated that the bonding between the borane and metal can be described as donation of the bonding electron pair of BH to the a1 orbital of [Cr(CO)5], and that π back-donation from the metal d orbital to the antibonding σ* orbital of BH is negligible. Compounds 1-3 can be regarded as model compounds of the methane complex [M(CO)5(CH4)], which is observed in the photolyses of [M(CO)6] in methane matrixes. Structural and spectroscopic features of the ligated borane are discussed and compared with those of related compounds.