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Calculation Of First-order Properties

Computation of first-order properties is requested via


and enables calculation of various one-electron properties such as dipole moment, quadrupole moment, octopole moment, electric field gradients, relativistic corrections (MVD1 approximation), and in the case of open-shell systems spin densities. In addition, a Mulliken population analysis using the corresponding density-matrix is carried out.

At the CC level, first-order properties can be either computed with orbital relaxation included (default option and usually recommended) or with orbital relaxation excluded (requested via DIFF_TYPE=UNRELAXED, consistent with the CC response theory treatment of higher order (frequency-dependent) properties).


first-order property calculations

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Page last modified on January 15, 2009, at 08:40 PM
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CFOUR is partially supported by the U.S. National Science Foundation.