Synthesis, characterization and thermogravimetric analysis of two dicyclohexyl-18-crown-6 Pd, Pt isomaleonitriledithiolate complexes

Two organic-inorganic hybrid dicyclohexyl-18-crown-6 complexes, [K(DC18C6-B)](2)[Pd(i-mnt)(2)] (1) and [K(DC18C6-A)](2)[Pt(i-mnt)(2)] (2) (DC18C6-A=cis-syn-cis-dicyclohexyl-18-crown-6, A isomer; DC18C6-B = cis-anti-cis-dicyclohexyl-18-crown-6, B isomer; i-mnt=1,1-dicyanoethene-2,2-dithiolate, isomaleonitriledithiolate), were synthesized by the reaction of dicyclohexyl-18-crown-6 with K-2(i-mnt) and PdCl2 or K2PtCl4 respectively. These were characterized by elemental analysis, FT-IR, UV-Vis spectroscopy and single crystal X-ray diffraction. In complex 1, two [K(DC18C6-B)](+) complex cations and one [Pd(i-mnt)(2)](2-) complex anion formed a neutral molecule through two K-N coordination bonds. The resulting molecule adopted a 1D chain arrangement via K N weak interactions. Complex 2 showed a 1D chain-like structure that was assembled by two [K(DC18C6-A)](+) complex cations and one [Pt(i-mnt)(2)](2-) complex anion through N-K-N interactions.