Quadrupole coupling constants transition metal compounds

Nuclear quadrupole coupling constants can thus provide much valuable information about chemical bonding in transition metal compounds since they can be obtained both for the metal and, or for the attached atom in many cases. There are, however, a number of disadvantages inherent in the technique. The resonances are often of very low intensity thus necessitating a large sample size (up to 10 grams). Furthermore, the complete region of interest, 2—1,000 MHz, cannot be covered by one... 

Table 12. Nuclear quadrupole coupling constants of some transition metal nuclei in diamagnetic compounds...

No N nuclear quadrupole resonance (NQR) studies have been reported for transition metal nitrosyl complexes. This technique is expected to show interesting differences between linear and bent nitro-syls since the values of the quadrupole coupling constant and the asymmetry parameter depend on the relative populations of the nitrogen s,p, py, andpz orbitals. NQR spectroscopy has been used to study organic and inorganic nitroso compounds, and it is found that both... 

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