Relationship between covalency and

Given the apparent relationship between covalence and contraction of the unit cell volume described previously, it should be possible to relate Rv to the reduction in magnetic moment found by resonance and neutron diffraction. In this we are limited to the cations Mn2+, Fe2+, Co2+, and Ni2+ in octahedral coordination. 

Molecular structure and shape are related to orbital angular momentum and chemical change is shown to be dictated by the quantum potential. The empirical parameters used in computer simulations such as molecular mechanics and dynamics are shown to derive in a fundamental way from the relationship between covalence and the golden ratio. 

Are there other ways in which the question of the covalency of the hydrogen bond, and the relationship between covalency and J, can be addressed Oldfield (37) would answer this question in the affirmative. Based on his analysis of hydrogen bonding in proteins using three-bond spin-spin couplings ( Jn-c). chemical shifts, and AIM theory (38), Oldfield suggested that the trans... 

Relationships between covalency, interatomic distances and magnetic properties in halides and chal-cogenides. R. D. Shannon and H. Vincent, Struct. Bonding (Berlin), 1974,19,1-43 (50). 

Tofield BC (1975) The Study of Covalency by Magnetic Neutron Scattering. 21 1-87 Trautwein AX, Bill E, Bominaar EL, Winkler H (1991) Iron-Containing Proteins and Related Analogs-Complementary Mossbauer, EPR and Magnetic Susceptibility Studies. 78 1-96 Trautwein AX (1974) Mossbauer-Spectroscopy on Heme Proteins. 20 101-167 Tressaud A, Dance J-M (1982) Relationships Between Structure and Low-Dimensional Magnetism in Fluorides. 52 87-146... 

Shannon, R. D., Vincent, H. Relationship Between Covalency, Interatomic Distances, and Magnetic Properties in Halides and Chalcogenides. Vol. 19, pp. 1-43. 

NH O and NH O). Because there are significant differences between covalent and van der Waals radii of oxygen and nitrogen atoms, the relationships between optimum energy and optimum distances were sought separately for the three above-mentioned subsets [48]. Those relationships were not expected to be linear because energy values approach zero as distance increases. In that study a sigmoid function was used ... 

Relationships between Covalency, Interatomic Distances, and Magnetic Properties... 

---