Vibrational spectroscopy on iron(II) spin-crossover complexes with 4-substituted 2,6-bis(benzimidazol-2′-yl)pyridine

Autor:	Viktor Gutmann, Wolfgang Linert, Mohammed Enamullah
Rok vydání:	1995
Předmět:	Crystal chemistry.chemical_compound Crystallography chemistry Spin crossover Pyridine Substituent Cationic polymerization Spin transition Infrared spectroscopy Fourier transform infrared spectroscopy Photochemistry Spectroscopy
Zdroj:	Vibrational Spectroscopy. 9:265-271
ISSN:	0924-2031
DOI:	10.1016/0924-2031(95)00006-g
Popis:	Substituent and temperature effects on the spin-crossover behaviour of cationic complexes of iron(II)-X-2,6-bis(benzimidazol-2′-yl)pyridine (X = H, OH, Cl and CH3) were investigated by means of UV-visible and Fourier transform infrared spectroscopy on solid-state compounds. At room temperature the low-spin isomer is predominant for X = H and Cl complexes, whereas the X = OH complex shows a spin equilibrium and the CH3-substituted complex is present in its high-spin form. The spin-crossover behaviour for the Cl-substituted species corresponds to a ΔHSC of about 0.5 kJ mol−1, which is much lower than the respective values found for the solution. Crystal water seems to favour the low-spin state of the OH complex.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9e9ec46430bfe0429d0dbc52c9a693b4 https://doi.org/10.1016/0924-2031(95)00006-g Zobrazit plný text záznamu Full Text from ScienceDirect