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84216-48-8

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84216-48-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 84216-48-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,2,1 and 6 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 84216-48:
(7*8)+(6*4)+(5*2)+(4*1)+(3*6)+(2*4)+(1*8)=128
128 % 10 = 8
So 84216-48-8 is a valid CAS Registry Number.

84216-48-8Relevant academic research and scientific papers

Syntheses of Diphenic Anhydride-Mercury Compounds and Their Reaction with Nucleophilic Reagents

Takahashi, Teruo,Togashi, Shigeo,Morishita, Muneo,Takeda, Shiro

, p. 3020 - 3023 (2007/10/02)

Diphenic acid anhydride (1) is decarbonylated by prolonged heating with mercuric oxide (HgO) in acetic acid to give a diphenic anhydride-mercury compound (3).Since its infrared spectrum showed a shift of carbonyl adsorption to a very low wave number, the O-Hg linkage was considered to be in an ionic form (3'), with the carbon bonded to mercury becoming a carbonium ion.If this is the case, the compound would be expected to react with nucleophilic reagents and indeed 3 is reactive to KI, H2S and KCN.Keywords-diphenic anhydride-mercury compound; mercuration; carbon-mercury bond; carbonyl adsorptions; nucleophilic; the reaction mechanism; protonation

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