Mechanochemical Reaction of Polymeric Oxovanadium(IV) Complexes with Schiff Base Ligands Derived from 5-Nitrosalicylaldehyde and Diamines

✍ Scribed by Masanobu Tsuchimoto; Gakuse Hoshina; Naoki Yoshioka; Hidenari Inoue; Kiyohiko Nakajima; Mayumi Kamishima; Masaaki Kojima; Shigeru Ohba

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 185 KB
• Volume: 153
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8710

✦ Synopsis

Light brown [VO(5-NO 2 salen)] ' 2H 2 O (1; H 2 (5-NO 2 salen)‫؍‬N, N-di-5-nitrosalicylidene-1,2-ethanediamine) and orange [VO(5-NO 2 sal-meso-stien)] ' 0.5H 2 O (2; H 2 (5-NO 2 salmeso-stien) ‫؍‬ N,N-di-5-nitrosalicylidene-(R,S)(S,R)-1,2diphenyl-1,2-ethanediamine) which have linear chain structures in the solid state turn dark brown and yellow-brown, respectively, when ground thoroughly in mortars. The IR spectra of 1 and 2 in Nujol mulls show strong V‫؍‬O stretching bands at 875 and 905 cm ؊1 , respectively. On the other hand, the spectra of the 5nely ground complexes in Nujol mulls show very weak V‫؍‬O stretching bands. X-ray powder di4raction patterns of the ground complexes scarcely show di4raction peaks. The spectroscopic and magnetic data suggest that the linear chain structures in the crystals of 1 and 2 are destroyed on grinding to yield the fragments of the polymeric chains.