Iron(II) complexes with unsubstituted saturated tetraaza macrocyclic ligands of varying ring size
Journal Article
·
· Inorg. Chem.; (United States)
Iron(II) complexes have been synthesized with 13-, 14-, 15-, and 16-membered, unsubstituted, fully saturated, tetradentate, macrocyclic ligands having nitrogen donor atoms. The complexes exhibit cis, trans, and dimeric six-coordinate geometries while displaying spin states which include low spin (S = 0), intermediate spin (S = 1), and high spin (S = 2). Moessbauer spectra and d-d electronic spectra have been obtained and correlated with structural features. Limited but significant series of compounds in both the high-spin and low-spin configuration show that ligand field strength increases dramatically as ring size decreases. Comparisons with earlier results on Me/sub 6/(14)aneN/sub 4/ indicate that the interactions of axial methyl groups weaken the metal-ligand interaction for both the axial ligands and the macrocycles. The effect of ring size on partial center shifts has been evaluated. (auth)
- Research Organization:
- Ohio State Univ., Columbus
- OSTI ID:
- 7365407
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 15:2; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AMINES
ANGULAR MOMENTUM
AROMATICS
CHEMICAL PREPARATION
COMPLEXES
CRYOGENIC FLUIDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FLUIDS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INFRARED SPECTROMETERS
IRON COMPLEXES
LIGANDS
MEASURING INSTRUMENTS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
SPECTRAL SHIFT
SPECTROMETERS
SPECTROPHOTOMETERS
SPIN
STEREOCHEMISTRY
SYNTHESIS
TOLUENE
TRANSITION ELEMENT COMPLEXES
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AMINES
ANGULAR MOMENTUM
AROMATICS
CHEMICAL PREPARATION
COMPLEXES
CRYOGENIC FLUIDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FLUIDS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INFRARED SPECTROMETERS
IRON COMPLEXES
LIGANDS
MEASURING INSTRUMENTS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
SPECTRAL SHIFT
SPECTROMETERS
SPECTROPHOTOMETERS
SPIN
STEREOCHEMISTRY
SYNTHESIS
TOLUENE
TRANSITION ELEMENT COMPLEXES