Metal isotope effect on metal-ligand vibrations. XI. Far-infrared spectra of cis tin tetrahalide (L-L) type complexes

1973 ◽  
Vol 12 (10) ◽  
pp. 2446-2449 ◽  
Author(s):  
Noboru Ohkaku ◽  
Kazuo Nakamoto
Keyword(s):  
Isotope Effect ◽  
Infrared Spectra ◽  
Far Infrared ◽  
Far Infrared Spectra ◽  
Metal Ligand

Metal Isotope Effect on Metal-Ligand Vibrations. IX. Far Infrared Spectra of Octahedral Nickel Halide Complexes of Pyridine and γ-Picoline

1973 ◽  
Vol 27 (3) ◽  
pp. 213-217 ◽  
Author(s):  
Y. Saito ◽  
C. W. Schläpfer ◽  
M. Cordes ◽  
K. Nakamoto
Keyword(s):  
Isotope Effect ◽  
Infrared Spectra ◽  
Far Infrared ◽  
Isotopic Shifts ◽  
Halide Complexes ◽  
Far Infrared Spectra ◽  
Metal Ligand

The far infrared spectra of Ni (pyridine)4X2 and Ni(γ-picoline)4X2 (X = CI, Br and I) have been measured. The Ni-X and Ni-N stretching bands have been assigned based on isotopic shifts due to the 58Ni-62Ni, pyridine-pyridine-d5, and Cl-37Cl substitutions.

Isotopic Studies of the Metal–Ligand Bond. Part III. The Far Infrared Spectra of Some Tetragonal Diamine Complexes of Cobalt(II) and Nickel(II): Studies of the Metal–Nitrogen Bond, as a Function of Metal Ion and of Spin State

1973 ◽  
Vol 51 (10) ◽  
pp. 1567-1581 ◽  
Author(s):  
A. B. P. Lever ◽  
Elvio Mantovani
Keyword(s):  
Infrared Spectra ◽  
Metal Ion ◽  
Far Infrared ◽  
Geometric Factors ◽  
Square Planar ◽  
Isotopic Studies ◽  
First Time ◽  
Far Infrared Spectra ◽  
Metal Ligand ◽  
Nitrogen Bond

The far infrared spectra of 35 complexes of the formula M(diamine)2X2 are reported where M = Co(II) and Ni(II), X = Cl−, Br−, I−, NO3−, SCN−, ClO4−, and AgI2− and the diamine is ethylenediamine or its N,N-symmetric or antisymmetrically substituted dimethyl or diethyl derivative. Isotopic substitution studies with 62Ni and with 2H are carried out with eleven characteristic complexes and assignments for the metal–nitrogen modes in both octahedral and square planar complexes so deduced. In most cases the appropriate number of metal–ligand modes, based on symmetry considerations, are observed. The variations in observed M—N frequencies are discussed in terms of the electronic and geometric factors previously utilized for the corresponding copper(II) complexes. In complexes containing the asymmetric ligands, stretching vibrations arising from the two types of metal–nitrogen bond can be separately identified. Isotopic studies of pairs of complexes containing the same ligand and metal ion but with the latter in alternate spin states are reported here for the first time. All of the cobalt(II) complexes and several of the nickel(II) complexes are reported here for the first time.

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