Polarographic behaviour of some organotin(IV) compounds in dimethyl sulphoxide

Abstract

The differential pulse polarographic behaviour in dimethyl sulphoxide (DMSO) of 14 organotin(1V) compounds having the general formula R3SnX (R = Me, Ph; X-= NCS-, Ny, NO;, OH-, NCOand OAc -) and "Bu3SnCI and "Bu2SnC12 has been studied. The peak potential was found to depend markedly on the organic group and to a lesser extent on the nature of the anion X. The phenyltin compounds were reduced at lower potentials than the corresponding methyltin compounds. The data obtained could be used for trace determination of these compounds. Linear calibration curves were obtained over the concentration range of 2.8 x lo-* to 1.9 x lop6 mol

Coordination Chemistry of Disilylated Stannylenes with Group 10 d10Transition Metals: Silastannene vs Stannylene Complexation

“…On the other hand was the 1 J (PtSn) coupling constant of 3 of 2990 Hz found to be unexpectedly large. 26,27 A similar coupling pattern as observed for the 2 J (PSn) couplings was also detected in the 29 Si NMR spectra. Larger trans- than and cis- 2 J (PSi) couplings lay in the ranges from 91 to 102 Hz for the trans - and from 14 to 26 Hz for the cis- 2 J (PSi) couplings for compounds 3 – 6 .…”

“…Although the trans- and cis- 2 J (PSn) couplings of the silastannene complexes are quite different, the magnitude of this difference is much smaller than reported for complexes of the type: (R 3 P) 2 M(X)SnR′ 3 ( M = Pt, Pd; X = halide, alkyl, aryl). 26,27 For compounds 3 and 6 , bearing the dppe ligands; trans- 2 J (PSn) couplings of 668 ( 3 ) and 560 ( 6 ) Hz were observed, while the cis- 2 J (PSn) coupling constants for both were close to 110 Hz. Complexes 4 and 5 with nonchelating phosphine ligands exhibited trans- 2 J (PSn) couplings of 641 ( 4 ) and 656 ( 5 ) Hz and the cis- 2 J (PSn) couplings for both amounted to 161 Hz.…”

Reactions of hafnocene stannyl complexes with stannanes: implications for the mechanism of the metal-catalyzed dehydropolymerization of secondary stannanes

“…Interestingly, a recent report of R 2 Sn (R¼Me, Et, Ph) insertion into the Pt -Cl bond of the platinum(II) complexes [Pt(X)(Cl)L 2 ] (X¼Cl, Me, Ph; L¼PEt 3 ) to give [Pt(X)(SnR 2 Cl)L 2 ] suggests that stannylene insertion into a metal-ligand bond may be a viable mechanism for this transformation. 21 …”

Synthesis, characterization, and biological studies of tri‐ and diorganotin(IV) complexes with 2′,4′‐difluoro‐4‐hydroxy‐[1,1′]‐biphenyle‐3‐carbolic acid: Crystal structure of [(CH3)3Sn(C13H7O3F2)]

“…The identification of alkyl/phenyl carbons in all the complexes confirms complexation, and the complete assignment of the signals confirms the identity of the compounds. The coupling constants 1 J [ 119 Sn- 13 C] and the values of the interbond angle C Sn C are the most important indicators for the structural evaluation of organotin carboxylate [32][33][34][35][36]. For the trimethyl, dibenzyl, and tribenzyltin derivatives 1 J values lie in the narrow range of 350-382 Hz (Table 7), corresponding to the average value of the angle θ = 107-111…”