Effect of competing π-donor N-bound ligands on structure and bonding. Synthesis and structure of tungsten organoimido nitrido complexes

1999 ◽  
pp. 1815-1816 ◽  
Author(s):  
Caroll E. Pohl-Ferry ◽  
Joseph W. Ziller ◽  
Nancy M. Doherty
Keyword(s):  
Nitrido Complexes ◽  
Structure And Bonding

STRUCTURE AND BONDING NATURE OF Pd-Si AMORPHOUS ALLOYS

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-104-C2-106
Author(s):  
A. Matsuzaki ◽  
S. Nanao ◽  
H. Ino
Keyword(s):  
Amorphous Alloys ◽  
Structure And Bonding

ESR study of the structure and bonding situation in thiocyanatocopper(II) complexes with imidazole derivatives

1988 ◽  
Vol 53 (1) ◽  
pp. 56-60
Author(s):  
Anna Mašlejová ◽  
Reinhard Kirmse
Keyword(s):  
Unpaired Electron ◽  
Hyperfine Splitting ◽  
Esr Spectra ◽  
Ligand Field ◽  
Imidazole Derivatives ◽  
Bonding Parameters ◽  
Monomeric Complex ◽  
Structure And Bonding ◽  
Frozen Solutions ◽  
Planar Symmetry

ESR spectra of thianatocopper(II) complexes with imidazole derivatives were studied in ethanolic solutions at 295 and 123 K. Axialsymmetric spectra, attributed to the monomeric complex units, were obtained for the frozen solutions. The bonding parameters were interpreted by using calculated g, Cu-hyperfine, and 14N-ligand hyperfine splitting values. The Cu-N bond parameters indicate a considerable delocalization of the unpaired electron. The values of the isotropic Cu-hyperfine splitting suggest that the deviations from the planar symmetry of the CuN4 units are due to tetrahedral perturbation of the ligand field.

Magnetic structure and bonding of rare-earth diboride compounds R B2 : First-principles calculations

2012 ◽  
Vol 249 (7) ◽  
pp. 1470-1476 ◽  
Author(s):  
S. Kacimi ◽  
B. Bekkouche ◽  
A. Boukortt ◽  
F. Zazoua ◽  
M. Djermouni ◽  
...  
Keyword(s):  
Rare Earth ◽  
Magnetic Structure ◽  
First Principles ◽  
First Principles Calculations ◽  
Structure And Bonding

Structure and bonding in cyclic phosphoramidates as determined by carbon-13 magnetic resonance

1979 ◽  
Vol 57 (1) ◽  
pp. 21-26 ◽  
Author(s):  
Gerald W. Buchanan ◽  
Frederick G. Morin
Keyword(s):  
Magnetic Resonance ◽  
Nitrogen Atom ◽  
Electron Pair ◽  
Chemical Shifts ◽  
Lone Pair ◽  
Ring Conformation ◽  
Delocalized Electron ◽  
Nitrogen Lone Pair ◽  
Structure And Bonding

13C chemical shifts and 13C–31P couplings are reported for 11 cyclic phosphoramidates of ring sizes from four to nine. Vicinal couplings are compared with those of carbocyclic analogs and provide insight regarding the degree of nitrogen lone pair derealization into the N—P bond. For six-membered and larger rings, there appears to be nearly complete lone pair delocalization, i.e., a trigonal planar nitrogen atom. In azetidine derivatives the nitrogen lone pair remains localized, giving rise to a highly puckered ring conformation. Pyrrolidine derivatives are viewed as having a nitrogen with a partially delocalized electron pair.

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