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2,4,6,9-tetra-tert-butyl-8-dibutylstanna-1,3,5,7-tetraphosphapentacyclo[4.3.0.0(2,5).0(3,9).0(4,7)]nonane is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

203740-79-8

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203740-79-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 203740-79-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,7,4 and 0 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 203740-79:
(8*2)+(7*0)+(6*3)+(5*7)+(4*4)+(3*0)+(2*7)+(1*9)=108
108 % 10 = 8
So 203740-79-8 is a valid CAS Registry Number.

203740-79-8Downstream Products

203740-79-8Relevant academic research and scientific papers

Hydrostannylation of phosphaalkynes

Schmitz, Marion,Goeller, Rudolf,Bergstraesser, Uwe,Leininger, Stefan,Regitz, Manfred

, p. 227 - 235 (2007/10/03)

The hydrostannylation of phosphaalkynes 8 with tin hydrides 1 depends on the stoichiometry employed: Thus, the 1,2-dihydro-1,3-diphosphetes 10 are isolated when an excess of phosphaalkyne 8 is used. On the other hand, an increase in the tin hydride concentration favors the formation of the phosphanes 11 and 12. Synthesis of the 1,2-dihydro-1,3-diphosphetes 14 and 16 was achieved by the use of diorganotin hydrides 13 or chloro(organo)tin hydrides 4, respectively. An isolated and characterized by-product of the latter reaction was the phosphorus-carbon-tin cage 17. Furthermore, the following reactions of the 1,2-dihydro-1,3-diphosphetes 10 were performed: isomerization reactions, complexation reactions with transition-metal complexes, and substitution of the hydrogen atom by iodine.

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