THE KINETICS AND MECHANISM OF ACETYLENE REACTIONS IN AQUEOUS IODIDE SOLUTIONS OF PLATINUM COMPLEXES .2. HYDROIODINATION OF ACETYLENE IN THEPT(IV)-NAI-H-H2O SYSTEM()

Authors
MITCHENKO SA ZAMASHCHIKOV VV SHUBIN AA
Citation
Sa. Mitchenko et al., THE KINETICS AND MECHANISM OF ACETYLENE REACTIONS IN AQUEOUS IODIDE SOLUTIONS OF PLATINUM COMPLEXES .2. HYDROIODINATION OF ACETYLENE IN THEPT(IV)-NAI-H-H2O SYSTEM(), Kinetics and catalysis, 34(3), 1993, pp. 421-425
Citations number
10
Categorie Soggetti
Chemistry Physical
Journal title
Kinetics and catalysis → ACNP
ISSN journal
00231584
Volume
34
Issue
3
Year of publication
1993
Pages
421 - 425
Database
ISI
SICI code
0023-1584(1993)34:3<421:TKAMOA>2.0.ZU;2-M
Abstract
The mechanism of a new catalytic reaction of acetylene hydroiodination in the Pt(IV)-NaI-H+-H2O system is studied at 353 K. It is found that the rapid and reversible C2H2 fixation via iodoplatination of multipl e bonds of HC=CH and Pt(IV)CH=CHI occurs at this temperature. Vinyliod ide is produced through successive reduction of the product of iodopla tination of acetylene by iodide ions, the beta-iodovinyl complex of Pt (IV), and protolysis of beta-iodovinyl derivatives of Pt(II). Protolys is competes with the reaction of beta-elimination, leading to acetylen e regeneration.