Showing papers on "Valency published in 1969"
TL;DR: The observed differences favor the view that the intrinsic functional properties of a and β chains of human hemoglobin are not equivalent, and two complementary valency hybrids are found to be different from each other with respect to oxygen affinity and Bohr ionizations.
66 citations
TL;DR: In this article, a self-consistent molecular orbital perturbation method suitable for use with the CNDO/2 approximations is formulated, and the polarizabilities are obtained.
Abstract: A self-consistent molecular orbital perturbation method suitable for use with the CNDO/2 approximations is formulated. The first-order perturbed equation is solved with an electric field perturbation for several molecules, and the polarizabilities are obtained. The results are too low, particularly for polarizabilities along short molecular axes, with a valency orbital basis set. The inclusion of 2p orbitals on hydrogen atoms gives improved results; but it is concluded that additional basis orbitals on other atoms are required for a valid interpretation of polarizabilities.
44 citations
Patent•
Esso1
TL;DR: Ionic crystals having a perovskite structure and comprising a solid solution of oxides of the formulas ABO3 and A''BO3 where A and A '' are nontransition metals and B is a transition metal present in two different valency states are effective cathodic electrocatalysts for use in electrochemical cells such as fuel cells as discussed by the authors.
Abstract: Ionic crystals having a perovskite structure and comprising a solid solution of oxides of the formulas ABO3 and A''BO3 where A and A'' are nontransition metals and B is a transition metal present in two different valency states are effective cathodic electrocatalysts for use in electrochemical cells such as fuel cells.
20 citations
TL;DR: In this article, the optical spectra and the magnetic susceptibilities were obtained in sodium phosphate glasses containing transition metal ions and it was shown that the content of the transition metal ion of higher valency states increases with an increase in that of Na2O whenever an oxidation equilibrium occurs between two or more valencies states.
Abstract: The optical spectra and the magnetic susceptibilities were obtained in sodium phosphate glasses containing transition metal ions. It was shown that the content of the transition metal ions of higher valency states increases with an increase in that of Na2O whenever an oxidation equilibrium occurs between two or more valency states. By combining the visible spectra analyzed from the viewpoint of the ligand field theory with the results of the magnetic susceptibility measurement, it was shown that most transition metals coordinate six oxygen atoms in the phosphates.
17 citations
8 citations
TL;DR: In this article, the relationship between damping parameter of a solid and the radius ratio is shown to be useful in differentiating between the various possible structural modifications under a given set of pressure and temperature conditions.
Abstract: : The compressibility of solids is expressed in terms of fundamental physical quantities in relation to the energy of an electron in the L-shell orbital. When the concept of 'apparent valency' z sub a = (rho)z, the product of classical valency (z) and the ratio (rho) of the atomic coordinations of two successive polymorphs is used, the formula becomes generally applicable. As a result, the structure of each substance under ambient conditions can be classified as being either in the 'reduced,' 'basic' or 'elevated' state. This allows the prediction of volumetric compressibility data from pertinent atomic data and physical constants as well as a qualitative prediction of possible structural modifications. The relationship between the damping parameter of a solid and the radius ratio is shown to be useful in differentiating between the various possible structural modifications under a given set of pressure and temperature conditions. (Author)
8 citations
6 citations
6 citations
TL;DR: In this article, the general relationship governing the IR-spectra of the compounds (C2H5)2Sb]3Ga and (C 2H5]2X) were examined.
Abstract: 1.
The general relationships governing the IR-spectra of the compounds [(C2H5)2Sb]3Ga and (C2H5)2SbX were examined, where X=C2H5, Br, Ge(C2H5)3, Si(C2H5)3, or Si(C2H5)[Ge(C2H5)3]2.
2.
A relationship was found between the frequency of the Sb-C valency vibration and the electronegativity of the substituent X.