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