Phenyltin Compounds

Recent Developments in Organotin Chemistry

“…and plicnyl-magnesium bromide [148] or phenyl lithium [149] c o r w miid approximately to diphenyltin only in their elei;?e11f~l composition but actitally consist oT m ' c or less branched phenyl-substituted tin chains. Other,pr Lctidly insoluble preparations [150] usually yklded a ce: sin amount of diphenyltin oxide. Thesp resiilts explain the large variations between the diverse substances earlier descg ibed as "diphenyltin".…”

Reaction products of dichlorodiorganostannanes with sodium in liquid ammonia: In-situ investigations with 119Sn NMR spectroscopy and usage as intermediates for the synthesis of tetraorganostannanes

“…However, conversion of dichlorodiorganostannanes with three to 10 molar equivalents of sodium yielded soluble intermediates. Instead of the frequently proposed R 2 Sn 2À dianions [4,5,12,17,26,29,30], R 2 SnH À and in the case of R ¼ butyl and R ¼ phenyl also dinuclear species of the type R 4 Sn 2 2À emerged. These species did not allow reliable conclusions about the reaction products resulting from exposure to bromoethane and vice versa.…”

“…In addition, it has been claimed that treatment of dihalodiorganostannanes with less than 4 molar equivalents of sodium (preferentially two equivalents) gives rise to the formation of oligostannanes or polystannanes ( Fig. 1) [1,4,5]; however the resulting products were not thoroughly characterized. Polystannanes are a unique class of polymers as their backbone consists of covalently bound metal atoms; they were first prepared by Löwig [32] and then mainly during the last two decades in various laboratories by different methods [33e52].…”

Synthetic aspects of tetraorganotins and organotin(IV) halides

“…(1), M 0 ¼ Zn). For example, diphenylzinc gives Ph 4 Sn in yields higher than 90% and in high purity [52].…”