Dimethyl sulfoxide ligand structure

Other polydentate ligands are polyamines and related ligands. Stability constants of silver(I) complexes with polyamines in dimethyl sulfoxide,419 A-methyl-substituted 4-methyldiethylene-triamines,420 or ethylene- or N- or C-methylated ethylenediamine in aqueous solution have been reported.421 The structure of the silver 1,3-diaminopropane complex, [Ag NH2(CH2)3NH2 ]-C104,422 and complex formation with 1,4-diaminobutane and 1,5-diaminopentane have been reported.423 A dinuclear silver(I) compound with ethylenediamine [(enH)Ag(en)Ag(enH)2]4+ has... 

Chapter 5- The coordination polymer [Zn(tmbdc)(dmso)2]-2(DMSO) (tmbdc = 2,3,5,6-tetramethyl-l,4-benzenedicarboxylate) has been synthesized by layer diffusion in DMSO (dimethyl sulfoxide) solution. The compound contains ID chain formed by octahedraly coordinated Zn ion chelated by the carboxyl groups of tmbdc. In another recently reported coordination polymer [Zn2(bdc)2(dmso)2]-5(DMSO) (bdc = 1,4-benzenedicarboxylate) prepared under the same condition, pairs of Zn ions are bridged by four carboxyl groups to form paddle-wheel sub unit and the 2D (4,4) net structure. Analysis of the structures reveals that the substituents of the ligands determine the coordination environments of zinc ions and the coordination modes of the carboxyls, and thus the final structures of the coordination polymers. 

A,A-dimethylformamide (DMF), and dimethyl sulfoxide (DMSO), will form complexes with the tin, breaking the polymeric structure of the dioxastannolane but maintaining a coordination number of greater than four at the metal. A m-R2Sn02L structure has been proposed on the basis of 119Sn chemical shifts (—137 to —189 ppm) and Mbssbauer data (A 2.11-2.82 mm/second). The donor ligand is readily lost under reduced pressure (224). 

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