Abstract 1, 3-Dimethyl-2-imidazolidinone (dimethylethylene urea, DMEU) and 1, 3-di-methyl- 3, 4, 5, 6-tetrahydro-2 (IH)-pyrimidinone (dimethylpropylene urea, DMPU) adducts of the type Ph 3 SnX· L (X= Cl, Br and I), Ph 3 PbX· L (X= Br, I), 3Ph 3 PbCl· 2DMEU and 2Ph 3 PbCl· DMPU have been prepared and characterized. Assignments are made for ν (CO) and ν (CN) frequencies in the IR, and for skeletal frequencies observed in both the IR and ...
