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72897-05-3

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72897-05-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 72897-05-3 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 7 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 72897-05:
(7*7)+(6*2)+(5*8)+(4*9)+(3*7)+(2*0)+(1*5)=163
163 % 10 = 3
So 72897-05-3 is a valid CAS Registry Number.

72897-05-3Relevant articles and documents

SYNTHESIS AND PROPERTIES OF TRIETHYLAMMONIUM 2,2,5-TRIPHENYL-1,3,2,5-DIOXABORATAPHOSPHORINANE

Nikonov, G. N.,Karasik, A. A.,Arbuzov, B. A.

, p. 1094 - 1099 (2007/10/02)

The reaction of bis(hydroxymethyl)phenylphosphine with isobutyl diphenylborate in the presence of triethylamine leads to the formation of triethylammonium 2,2,5-triphenyl-1,3,2,5-dioxaborataphosphorinane (1).The reaction of compound 1 with electrophilic reagents (O, S, Se, CH2O, RHal) leds to quaternization of the phosphorus atom, giving the corresponding phosphine oxides, sulfides, and selenides and P,B-containing betaines.In the reactions of compound 1 with amines aminomethylphosphines of the diazaphosphorinane and diazadiphosphacyclooctane series are formed.Ammonium 1,3,2,5-dioxaborataphosphorinanes dissociate in solution and enter into ion exchange with phosphonium iodides, leading to phosphonium 1,3,2,5-dioxaborataphosphorinanes.The latter, in the case of the aminomethylphosphonium cation, undergo intramolecular rearrangement with the formation of P,B-containing betaines and aminomethylphosphines. Keywords: Triethylammonium 2,2,5-triphenyl-1,3,2,5-dioxaborataphosphorinane, oxide, sulfide, aminomethylphosphine, ion exchange, triphenylmethylphosphonium 1,3,2,5-dioxaborataphosphorinane.

ORIENTATION OF PHENYL GROUP ATTACHED TO PHOSPHORUS ATOM IN 5-PHENYL-1,3-DI-R-1,3,5-DIAZAPHOSPHORINANES

Arbuzov, B. A.,Erastov, O. A.,Nikonov, G. N.,Zyablikova, T. A.,Arshinova, R. P.,Kadyrov, R. A.

, p. 1115 - 1119 (2007/10/02)

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