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72894-66-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 72894-66-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,8,9 and 4 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 72894-66:
(7*7)+(6*2)+(5*8)+(4*9)+(3*4)+(2*6)+(1*6)=167
167 % 10 = 7
So 72894-66-7 is a valid CAS Registry Number.

72894-66-7Downstream Products

72894-66-7Relevant articles and documents

TETRACARBONYLWOLFRAM-KOMPLEXE MIT ZWEI UNTERSCHIEDLICHEN DONORLIGANDEN. I. DARSTELLUNG UND MECHANISMUS DER THERMISCHEN ISOMERISIERUNG

Schenk, Wolfdieter A.

, p. 195 - 204 (2007/10/02)

cis- and trans-tetracarbonyltungsten complexes (R3P)(R'3E)W(CO)4 (R3P, R'3E=i-Pr3P, Ph2-i-PrP, Ph3P, Ph2HP, (Me2N)3P, Ph(i-PrO)2P, (i-PrO)3P, (PhO)3P, Ph3As, Ph3Sb) are obtained from the chlorotetracarbonyltungstates - by several different routes.A cis-trans equilibrium is attained at 20-80 deg C with the trans isomer being thermodynamically more stable in nearly all cases.The cis-trans isomerisation of the phosphine-arsine and phosphine-stibine complexes is shown by ligand exchange experiments to occur via dissociation of the arsine and stibine ligand, respectively.The bis(phosphine) complexes, however, isomerise intramolecularly without bond cleavage.

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