Solution-state spin-equilibrium properties of the tris(2-(2-pyridyl)imidazole)iron(II) and Tris(2-(2-pyridyl)benzimidazole)iron(II) cations

Journal Article · Sat Apr 01 00:00:00 EST 1978 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic50182a054· OSTI ID:6758351

Reeder, K A; Dose, E V; Wilson, L J

Contrary to previous reports, the tris(2-(2-pyridyl)imidazole)iron(II) ((Fe((py)imH)/sub 3/)/sup 2 +/) and tris(2-(2-pyridyl)benzimidazole)iron(II) ((Fe((py)bimH)/sub 3/)/sup 2 +/) cations have been shown to be spin-equilibrium species in solution by variable-temperature magnetic and electronic spectral studies. Laser Raman temperature-jump kinetics has been used to directly measure the forward (k/sub 1/ = 1.1 x 10/sup 7/s/sup -1/) and reverse (k/sub -1/ = 1.0 x 10/sup 7/s/sup -1/) intersystem crossing rate constants for the dynamic spin-interconversion process in (Fe((py)imH)/sub 3/)/sup 2 +/. The results are compared to similar kinetic data available for other iron(II) spin-forbidden/conversion processes in bis(pyrazolylborate)iron(II) and (Fe(6-Mepy)/sub n/(py)/sub m/tren)/sup 2 +/. 2 tables, 3 figures, 36 references.

• Research Organization: Rice Univ., Houston, TX
• OSTI ID: 6758351
• Journal Information: Inorg. Chem.; (United States), Vol. 17:4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON COMPLEXES
SPIN
SYNTHESIS
THERMODYNAMIC PROPERTIES
BENZIMIDAZOLES
COMPARATIVE EVALUATIONS
ELECTRON SPECTRA
HYDRATES
IMIDAZOLES
LOW TEMPERATURE
MAGNETIC PROPERTIES
MEDIUM TEMPERATURE
MOESSBAUER EFFECT
ORGANOMETALLIC COMPOUNDS
PYRIDINES
SOLUTIONS
STRUCTURAL CHEMICAL ANALYSIS
TEMPERATURE DEPENDENCE
THERMAL EQUILIBRIUM
ANGULAR MOMENTUM
AZINES
AZOLES
COMPLEXES
DISPERSIONS
EQUILIBRIUM
HETEROCYCLIC COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
SPECTRA
TRANSITION ELEMENT COMPLEXES
360102* - Metals & Alloys- Structure & Phase Studies
360104 - Metals & Alloys- Physical Properties