Practical physical chemistry,

Mode of access: Internet.

Outlines of physical chemistry.

Mode of access: Internet.

A system of physical chemistry,

Bibliographical footnotes.

Physical chemistry,

Mode of access: Internet.

Fundamentals of physical chemistry,

Mode of access: Internet.

A manual of practical physical chemistry.

Mode of access: Internet.

Experimental and Theoretical Electron Density Analysis of Copper Pyrazine Nitrate Quasi-Low-Dimensional Quantum Magnets

The accurate electron density distribution and magnetic properties of two metal-organic polymeric magnets, the quasi-one-dimensional (1D) Cu(pyz)(NO3)2 and the quasi-two-dimensional (2D) [Cu(pyz)2(NO3)]NO3·H2O, have been investigated by high-resolution single-crystal X-ray diffraction and density functional theory calculations on the whole periodic systems and on selected fragments. Topological analyses, based on quantum theory of atoms in molecules, enabled the characterization of possible magnetic exchange pathways and the establishment of relationships between the electron (charge and spin) densities and the exchange-coupling constants. In both compounds, the experimentally observed antiferromagnetic coupling can be quantitatively explained by the Cu-Cu superexchange pathway mediated by the pyrazine bridging ligands, via a σ-type interaction. From topological analyses of experimental charge-density data, we show for the first time that the pyrazine tilt angle does not play a role in determining the strength of the magnetic interaction. Taken in combination with molecular orbital analysis and spin density calculations, we find a synergistic relationship between spin delocalization and spin polarization mechanisms and that both determine the bulk magnetic behavior of these Cu(II)-pyz coordination polymers.

Comprehensive inorganic chemistry

Bibliographical footnotes.

Quantum theory, with applications to chemistry.

Reproduced from typewritten copy.

The chemistry of the inorganic complex compounds; an introduction to Werner's coordination theory,

Translation of: Chemie der anorganischen komplex Verbindungen.

The new chemistry /

Includes index.

Electronic interpretations of organic chemistry.

Bibliographical footnotes.

Síntese, caracterização estrutural, espectroscópica e análise do potencial fotocatalítico do aluminato de cobalto e potencial catalítico na preparação do biodiesel

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)