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49695-20-7

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49695-20-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 49695-20-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,9,6,9 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 49695-20:
(7*4)+(6*9)+(5*6)+(4*9)+(3*5)+(2*2)+(1*0)=167
167 % 10 = 7
So 49695-20-7 is a valid CAS Registry Number.

49695-20-7Relevant articles and documents

A novel dimanganese complex linked by an unusually strong hydrogen bond. X-ray structure of the hydrogen-bonded complex and ab initio calculations

Becker, Thomas M.,Bauer, Jeanette A. Krause,Bene, Janet E. Del,Orchin, Milton

, p. 165 - 170 (2007/10/03)

In an attempt to prepare the fluoro complex (CO)3(dppe)MnF (3) by treating a CH2Cl2 solution of the aqua complex [(CO)3(dppe)Mn(OH2)]BF4 (1) with NaF(aq), we isolated instead, the dimanganese complex, [(CO)3(dppe)Mn(OH2)FMn(dppe)(CO)3]BF 4 (2). The two moieties, 1 and 3, are held together by an unusually strong O-HF hydrogen bond (OF=2.458(3) ?, HF=1.52 ?) between the aqua ligand on one manganese and the fluoro atom on the other manganese. Using as a simple model the interaction between +Li(H2O) and FLi, the hydrogen bonding distance O-HF was calculated to be; OF=2.443 ?. Authentic 3 was prepared in a homogeneous system using CH2Cl2-soluble [Et4N]F.

Conversion of a manganese-carbon-bonded complex to a manganese-oxygen-bonded complex, some reactions of manganese carbonato complexes

Li, Guang Qing,Burns, Robert M.,Mandal, Santosh K.,Bauer, Jeanette Krause,Orchin, Milton

, p. 89 - 94 (2007/10/03)

Stirring a solution of the manganese carboxylate, (dppe)(CO)3Mn-C(O)OCH3, 1, in dichloromethane saturated with water converts it to the bridging carbonato complex, (dppe)(CO)3Mn-OC(O)O-Mn(CO)3(dppe), 2. This multi-step conversion involves the in-situ transformation of a Mn-C bonded complex to a Mn-O bonded one. When 2 is stirred with HCl, it is converted quantitatively to the covalent chloride (dppe)(CO)3Mn-Cl, 11, with evolution of carbon dioxide. Similar HCl treatment of the manganese carboxylate 1 gives three compounds: the same covalent chloride, 11; the ionic chloride, [(dppe)(CO)4Mn] + Cl-, 12, and the hydride, (dppe)(CO)3Mn-H, 5. Reasonable schemes for these conversions are suggested. Heating the ionic chloride complex to its melting point converts it to the covalent chloride complex; the same transformation is accomplished by refluxing the ionic chloride in acetonitrile.

Reactions of ditertiary phosphines with η6-arenetricarbonylmanganese cations

Brown, David A.,Glass, W. Kenneth,Kreddan, Khaled M.,Cunningham, Desmond,McArdle, Patrick A.,Higgins, Tim

, p. 91 - 105 (2007/10/02)

Ditertiaryphosphines PPh2(CH2)nPPh2 (n = 1-3) react at room temperature with the η6-arenetricarbonylmanganese cations 6-XYC6H4)Mn(CO)3>+ (Ia, X = Y = H; Ib, X = Me, Y = H) by monocarbonyl substitution an formation of 6-XYC6H4)Mn(CO)2(η1-PPh2(CH2)nPPh2)>+.Prolonged refluxing results in metal-ring bond breaking and formation of cis- and trans-2-PPh2CH2PPh2)2>+ and trans-2-PPh2(CH2)2PPh2)2>+.Activation of a carbonyl group in 6-XYC6H4Mn(CO)2(η1-PPh2(CH2)nPPh2)>+ by TMNO gives the series of chelate complexes 6-XYC6H4Mn(CO)(η2-PPh2(CH2)nPPh2)>+ (n = 1 - 3).The X-ray structure of the chelate with n = 3 is reported.In the case of 6-XYC6H4)Mn(CO)3>+ (Ic, X = Cl, Y = H); Id, X = Cl, Y= Me), formation of fac-Mn(CO)3(η2-PPh2(CH2)nPPh2Cl (n = 1, 2) occurs, in a reaction analogous to that with monophosphines, see D.A.Brown, W.K.Glass and K.M.Kreddan, J.Organomet.Chem., 413 (1991) 223, but there was no evidence for ring adducts as intermediates.

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