Synthesis and Crystal Structures of New 18-Crown-6 Complexes With M2[Sn(i-mnt)3](M = K, Na)

Abstract

Two new crown complexes, {[K(18-C-6)]2[Sn(i-mnt)3]}n·nC4H10O (1) and [Na(18-C-6)H2O]2[Sn(i-mnt)3]·2H2O·0.5C2H4Cl2 (2), have been prepared (i-nmt = 1,1-dicyanoethene-2,2-dithiolate), and characterized by elemental analysis, IR spectra and X-ray diffraction. In complexes 1 and 2, the coordination sphere for the Sn atom is slightly distorted trigonal bipyramid. The K(18-C-6) cations in complex 1 are linked to the Sn ion through the N atoms of the bridging C2S2(CN)22− anions, therefore forming two-dimensional network. For complex 2, because the coordinated H2O molecule to the Na+ prevents the further molecular structural extension, it is only a discrete trinuclear SnNa2 complex.