Preparation and X-ray structural and spectroscopic studies of D-lactobionic acid complexes of Cs(I) and di-n-butyltin(IV)

D-Lactobionic acid (4-O-beta -D-galactopyranosyl-D-gluconic acid) complexes of Cs(I) ion and din-butyltin(IV)(2+) were prepared in the solid state. Th e bonding sites of the ligands were verified by means of FTIR, Raman and C- 13-NMR spectroscopic measurements. The Cs-D-lactobionate was obtained in si ngle-crystal form. The X-ray crystallographic results on Cs-D-lactobionate demonstrated that each Cs(I) ion is bonded to four D-lactobionate ions, for ming an intricate 3D network. The asymmetric unit consists of one Cs(I), on e D-lactobionate ion and one water molecule. For the di-n-butyltin(IV) comp lex, Mossbauer PQS calculations indicated octahedral and trigonal-bipyramid al stereochemistry around the central tin atom in the oligomeric compound. In DMSO solution the polymeric structure do not remain as shown by C-13-NMR measurement.