Coordination polymers based on building blocks of dimethyltin(IV) Chloride iso-thiocyanate and dimethyltin(IV) di-iso-thiocyanate with pyrazine-2-carboxylate and 4, 4′-bipyridine

✍ Scribed by Ezzatollah Najafi; Mostafa M. Amini; Omid Sadeghi; Hamid Reza Khavasi; Seik Weng Ng

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 284 KB
• Volume: 22
• Category: Article
• ISSN: 1042-7163
• DOI: 10.1002/hc.20736

✦ Synopsis

Abstract

The reaction of 4,4′‐bipy with dimethyltin(IV) chloride iso‐thiocyanate affords the one‐dimensional (1D) coordination polymer, [Me~2~Sn(NCS)Cl·(4,4′‐bipy)]~n~ (1), whereas reaction of dimethyltin(IV) dichloride with sodium pyrazine‐2‐carboxylate in the presence of potassium iso‐thiocyanate affords the two‐dimensional (2D) coordination polymer, {[Me~2~Sn(C~4~H~3~N~2~COO)~2~]~2~ [Me~2~Sn(NCS)~2~]}~n~ (2). Both coordination polymers were characterized by elemental analysis and infrared spectroscopy in addition to ^1^H and ^13^C NMR spectroscopy of the soluble coordination polymer (1). A single‐crystal structure determination showed that the asymmetric unit in 1 contains Me~2~Sn(NCS)Cl and 4,4′‐bipy moieties and a 1D infinite rigid chain structure forms through bridging of the 4,4′‐bipy ligand between tin atoms and the geometry around the tin atom is a distorted octahedral. Coordination polymer 2 contains two distinct tin atom geometrics in which one tin atom is seven coordinate, and the other is six coordinate. The two tin atom environments are best described as a pentagonal bipyramidal in the former and distorted octahedral in the latter where the carboxylate groups bridge the two tin atoms and construct a 2D‐coordination polymer. The ^119^Sn NMR spectroscopy indicates the octahedral geometry of 1 retains in solution. © 2011 Wiley Periodicals, Inc. Heteroatom Chem 22:699–706, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/.20736