Synthesis and characterization of bis(ferrocenylcarboxylato)telluranes

• Published in: Canadian journal of chemistry Vol. 85; no. 7-8; pp. 534 - 539
• Main Authors: Srivastava, Prakash C, Bajpai, Sangeeta, Kumar, Rajesh, Srivastava, Shikha, Singh, Vikas, Dwivedi, Shrinkhala, Butcher, Ray J
• Format: Journal Article
• Language: English
• Published: Ottawa, Canada NRC Research Press 01.07.2007; Canadian Science Publishing; Canadian Science Publishing NRC Research Press
• Subjects: Chemical compounds; Chemical reactions; Chemical synthesis; Chemistry; Chemistry, Multidisciplinary; Physical Sciences; Science & Technology; tellurane; SECONDARY BONDS; POLYMERS; electrochemistry; HIGH-MOLECULAR-WEIGHT; BEHAVIOR; ferrocenylcarboxylate; ARSENIC-BRIDGED FERROCENOPHANES; ELECTRON-TRANSFER; POLY(FERROCENYLSILANES); SPECTROSCOPIC CHARACTERIZATION; RING-OPENING POLYMERIZATION; SHG efficiency
• ISSN: 0008-4042; 1480-3291
• DOI: 10.1139/v07-073

A convenient route to the synthesis of the first bis(ferrocenyl carboxylato) telluranes has been developed. Reactions of 1,1,2,3,4,5,6-heptahydro-1,1-(dihydroxo)tellurane and 1,1,2,3,4,5-hexahydro-1,1-(dihydroxo)tellurophene with ferrocene carboxylic acid give 1,1,2,3,4,5,6-heptahydro-1,1-bis(ferrocenyl carboxylato)tellurane ( 3 ) and 1,1,2,3,4,5,-hexahydro-1,1-bis(ferrocenyl carboxylato)tellurophene ( 5 ), respectively. The X-ray structure of 3 shows that it contains a tellurium heterocycle (C 5 H 10 Te), present in a chair conformation, sandwiched between two ferrocene units with carboxylate groups acting as spacers. Compound 3 also exhibits modest second harmonic generation (SHG) efficiency. The electrochemical studies of 3 and 5 through cyclic voltammetry show only one oxidation wave, indicating the presence of independent redox centers leading to reversible single-step two-electron redox systems.Key words: tellurane, ferrocenylcarboxylate, SHG efficiency, electrochemistry.