Organotin derivatives of inorganic acids

Like carboxylates, numerous organotin derivatives ( esters ) of inorganic and element-organic acids (carbonates, nitrates, phosphates, phosphonates, phosphi-nates and their arsenic analogs, sulfonates, sulfinates, etc.), are characterized by supramolecular self-assembly in solution and/or supramolecular self-organization in solid state. 

The first probable structures of organotin nitrates were suggested on the basis of Sn Mossbauer and vibrational spectroscopic data. A polymeric structure with bridging NO3 groups has been suggested for trimethyltin nitrate, Me3SnN03,169. 

Introduction of organic groups on the phosphorus atom reduces the connectivity of the ligand and less complex, yet supramolecular, structures are formed. Thus, triphenyltin diphenylphosphate, Ph3Sn02P(0Ph)2 [526], and triphenyltin (O-methyl)methyl phosphonate, Ph3Sn02P(OMe)Me [527] are cyclic hexamers, 

Other triorganotin phosphinates self-assemble into chain-like, supramolecular helical arrays, 176 these include trimethyltin dimethylphosphinate, Me3Sn02PMe2, and dichlorophosphate, Me3Sn02PCl2 [529], and tri-n-butyltin diphenylphosphinate, Bu3Sn02PPh2 [530]. The self-assembly of tributyltin derivatives of phosphorus oxyacids (orthophosphates, phosphonates, and phosphinates), (Bu3Sn) 0 P(0)-Ph3 , n = 0-2, has been investigated by Sn and P NMR and Sn Moss-bauer spectroscopy results are indicative of intermolecular association both in solution and in the solid state [531]. On the basis of spectroscopic evidence associated structures in the solid state and in solution have also been suggested for tri- 

Occasionally supramolecular self-assembly occurs without participation of the organophosphorus ligand and involves only Sn2(/ -OH)2 four-membered cyclic moieties, also known in other hydroxo tin derivatives. This is so for the mono-thiophosphates [Ph2Sn(/r-OH)OSP(OEt)2]2 [536], [Ph2Sn(/z-OH) OSP(OPh)2 ]2 [537], and [Bu 2Sn(//-OH) OSP(OEt)2 ]2 [538], and for the monothiophosphinate [Ph2Sn(Ai-OH)(OSPPh2)]2 [539]. 

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Group 14 Metals - Tin and Lead 171 3.3.1.6 Organotin derivatives of inorganic acids... 

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