Abstract
Eight new diorganotin(IV) complexes of general formula R 2Sn(DP) 2 and [R 2Sn(DP)] 2O (DP = anion of N-benzoyl- dl-alanylglycine; R = CH 3, C 2H 5, n-C 4H 9, n-C 8H 17) have been prepared and characterised by IR, and 119mSn Mössbauer spectroscopy. However, only two complexes, (DP) 2Sn(n-C 4H 9) 2 and (DP) 2Sn(n-C 8H 17) 2 were sufficiently soluble for NMR ( 1H and 13C) studies. The 2 : 1 complexes are monomeric with distorted trans-octahedral structures. The 1 : 1 complexes are dinuclear with Sn-O-Sn bridges and trigonal bipyramidal geometry about tin. In both cases the dipeptide acts as an O,O-bidentate ligand.
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