LEWIS BASE ADDUCTS OF LEAD(I1) COMPOUNDS 111* SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF LPb(C10,), AND LPb(NCS),, (L= MESO-5,7,7,12,14, 14-HEXAMETHYL- 1,4,8,11- TETRA-AZACY COTETRADECANE)

The reactions of Pb(C10 ) , and Pb(SCN) with meso-5,7,7,12,14,14-hexamethyl- 1,4,8,ll ,tetra-azacyclotetradecane (C ,H ,N = L) yielded colorless crystals of LPb(CI O ) (1) and LPb(NCS) (2), respectively. Their structures were determined by X-ray crystallography. Crystal data: 1 monoclinic, P 2 /c, a =11.293 (4) ?, b = 16.382 (6) ? , c = 21.518(4) ?, ? = 92.14(2)?, Z = 4, MoKa, 1824 observed (1>2.5?(I )) data (20°C), R = 0.044; 2 ,orthorombic, P cab, a = 15.861(2) ? , b = 10.436(8) ?, c = 20.347(4) ?, ? = 90.00(3)?, Z= 4, MoK?, 1763 observed (1>2.5?(I) data (20°C), R= 0.05 1. In both molecules, lead(II) cation is situated above the plane of the macrocyclic ring