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.

Keywords:

• 18-Crown-6
• Sn complex
• synthesis
• crystal structure

Supplementary Material

Crystallographic data for the structural analysis of complexes 1 and 2 have been deposited with Cambridge Crystallographic Data Center, CCDC Nos. 600518 and 600519 for complexes 1 and 2, respectively. Copies of the data can be obtained free of charge from the Director, CCDC, 12 Union Road, Cambridge, CB2 1EZ, UK, (Fax: [phone]; E-mail: [email protected] or www: http://www.ccdc.cam.ac.uk).

Funding

The authors are grateful for financial support of this work from the Science and Technology Project in Colleges and Universities in Shandong Province (J10LB61)