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98749-91-8

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98749-91-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98749-91-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,7,4 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 98749-91:
(7*9)+(6*8)+(5*7)+(4*4)+(3*9)+(2*9)+(1*1)=208
208 % 10 = 8
So 98749-91-8 is a valid CAS Registry Number.

98749-91-8Relevant articles and documents

CHIMIE DES METALLOLES IV B . ACTION D'ORGANOLITHIENS SUR LES TETRAMETHYL-1,1,3,4 SILOLE OU GERMOLE

Dubac, Jacques,Iloughmane, Hafida,Laporterie, Andre,Roques, Christian

, p. 1315 - 1318 (1985)

The reaction of RLi ( R=nBu,tBu,PhLi ) with 1,1,3,4-tetramethylsilole or germole in THF gives via a ligand exchange ( SN-Si or Ge ) the 1-R-1,3,4 trimethylmetalloles or the 1,1-di-R-3,4-dimethylmetalloles (A).Metalation of MMe groups is not observed but a partial (nBuLi,PhLi) or important (tBuLi) isomerization of metalloles into the transoid exocyclic dienes (B) occurs.

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