Synthesis, structural characterization and 57Fe-Mössbauer spectra of ferrocenylhexasilanes
摘要:
Linear and cyclic ferrocenylhexasilanes 1,6-Fc-Si6Me12-X [X = Me, -C6H4CH double bondC(CN)(2)], 1,3- and 1,4-Fc-Si6Me10-X [X = Me, -C6H4CH double bondC(CN)(2)], have been synthesized and their Mossbauer spectra have been measured. All compounds possess localized electronic structures on the Mossbauer timescale and partial Fe(III) character of the iron atom due to Cp --> (Si-n) electron transfer. The Mossbauer data obtained, furthermore, indicate considerable aryl-ferrocenyl interaction via the hexasilane moiety. The single crystal X-ray structures of 1,3- and 1,4-Fc-Si6Me10-C6H4CH double bondC(CN)(2) exhibit the cyclohexasilane ring in chair conformation with the bulky Fc- and aryl substituents in equatorial positions. (C) 2001 Elsevier Science B.V. All rights reserved.
Synthesis, structural characterization and 57Fe-Mössbauer spectra of ferrocenylhexasilanes
摘要:
Linear and cyclic ferrocenylhexasilanes 1,6-Fc-Si6Me12-X [X = Me, -C6H4CH double bondC(CN)(2)], 1,3- and 1,4-Fc-Si6Me10-X [X = Me, -C6H4CH double bondC(CN)(2)], have been synthesized and their Mossbauer spectra have been measured. All compounds possess localized electronic structures on the Mossbauer timescale and partial Fe(III) character of the iron atom due to Cp --> (Si-n) electron transfer. The Mossbauer data obtained, furthermore, indicate considerable aryl-ferrocenyl interaction via the hexasilane moiety. The single crystal X-ray structures of 1,3- and 1,4-Fc-Si6Me10-C6H4CH double bondC(CN)(2) exhibit the cyclohexasilane ring in chair conformation with the bulky Fc- and aryl substituents in equatorial positions. (C) 2001 Elsevier Science B.V. All rights reserved.