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63950-40-3

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63950-40-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 63950-40-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,3,9,5 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 63950-40:
(7*6)+(6*3)+(5*9)+(4*5)+(3*0)+(2*4)+(1*0)=133
133 % 10 = 3
So 63950-40-3 is a valid CAS Registry Number.

63950-40-3Relevant articles and documents

Oxygen and chlorine atom transfer between tungsten, molybdenum, and rhenium complexes. Competition between one- and two-electron pathways

Over, Diana E.,Critchlow, Susan C.,Mayer, James M.

, p. 4643 - 4648 (2008/10/08)

Inter-metal oxygen atom transfer reactions between molybdenum, tungsten, and rhenium complexes are described. With only chloride and PMePh2 as supporting ligands, oxygen atom transfer is observed from rhenium to molybdenum and tungsten and from

Molybdenum-mediated imido group transfer: Stoichiometric and catalytic reactions and structures

Harlan, Edgar W.,Holm

, p. 186 - 193 (2007/10/02)

The isoelectronic relationship O2 = RN2- implies imido group transfer chemistry related to oxygen atom transfer reactivity, which is extensive for certain elements. This has subjected to its first systematic examination, using the N,N-diethyldithiocarbamate (Ei2dtc) complexes of molybdenum and the N-tosylimido (NTs) group. The imido group transfer reactions to Mo, MoO(Et2dtc)2 + XNR and Mo(CO)2(Et2dtc)2 + XNR, afford MoO(NTs) (Et2dtc)2 and Mo(NTs)2(Et2dtc)2, respectively, in yield with the imido group transfer reagents XNR = C5H5NNTs, PhMeSNTs, Ph3SbNTs, PhINTs, nd TsN3, MoO(NTs) (Et2dtc)2·1/2Ph Me crystallizes crystallizes in triclinic space PI with a = 9.212 (2) A?, b = 12,080 (4) A?, c = 14.310 (4) A?, α = 115,02 (2)°, β = 95.51 (2)°, γ = 100.34 (2)°, and Z = 2; the structure was refined to R = 4.8%. Mo(NTs)2(Et2dtc)2 was obtained in monoclinic space group,P21/n with a = 10.632 (2) A?, b = 16.307 (3) A?, c = 19.023 (5) A?, β = 101.29 (2)°, Z = 4; the structure was refined to R = 4.0%. The two compounds have a distorted octahedral structure with the multiply bonded group O and NTs in cis positions. Comparison of structures with that of MoO2(Et2dtc)2 reveals that the NTs group is a nearly isostructural replacement for oxo. The imido transfer reactions from Mo, MoO(NTs)(Et2dtc)2 + R3P, proceed but with the more basic phosphines favoring imido (R3PNTs) rattier than oxo (R3PO) transfer. Imido transfer to and from Mo involve the purple intermediates Mo2O2(NTs)(Et2dtc)4 and MoO(NTs)2(Etjdtc)4, respectively, which are in presumed equilibrium with Mo(IV,VI) complexes. The complex Mo(NTs)(Et2dtc)2, resulting from imido group transfer, was too unstable to be isolated. Group transfers to and from Mo were coupled to form the catalytic XNTs + R3P → X + R3PNTs, which did not proceed at a measurable rate in the absence of Mo(NTs)2(Et2dtc)2. The system based on PhMeSNTs + Ph2MeP 28 turnovers in 7.5 h in chloroform at 35 °C. The PhMeSNTs + 2PMSH → PhSMe + PhSSPh + TsNH2, in which benzenethiot acts as an electron donor, was also catalyzed by Mo(NTs)2(Et2dtc)2. All known imidometal group are tabulated, and oxo and imido transfer reactions of Mo are schematically summarized. rized.

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