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Hypertext Dalton 2.0 manual - Theoretical Chemistry, KTH

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CHAPTER 25.<br />

HF, SOPPA, AND MCSCF MOLECULAR PROPERTIES, ABACUS256<br />

.SKIP Skip the calculation of the relaxation contributions. This does not skip the solution<br />

of the response equations. This will give wrong results for a large number of secondorder<br />

molecular properties. Mainly for debugging purposes.<br />

.STOP Stop the entire calculation after the calculation of the relaxation contributions to<br />

the requested properties. Mainly for debugging purposes.<br />

.SYMTES Calculate both the ij and ji elements of the relaxation Hessian to verify its Hermiticity<br />

or anti-Hermiticity (depending on the property being calculated). Mainly for<br />

debugging purposes.<br />

25.1.14 Reorthonormalization contributions: *REORT<br />

Directives affecting the calculation of reorthonormalization contributions to the geometric<br />

Hessian appear in the *REORT section.<br />

.PRINT<br />

READ (LUCMD,*) IPRINT<br />

Set print level in the calculation of the lowest-order reorthonormalization contributions<br />

to the molecular Hessian. Read one more line containing print level. Default value is<br />

the value of IPRDEF from the general input module.<br />

.SKIP Skip the calculation of the reorthonormalization contributions to the molecular Hessian.<br />

This will give wrong results for this property. Mainly for debugging purposes.<br />

.STOP Stop the entire calculation after finishing the calculation of the reorthonormalization<br />

contributions to the molecular Hessian. Mainly for debugging purposes.<br />

25.1.15 Response calculation: *RESPON<br />

Directives affecting the response (coupled-perturbed MCSCF) calculation of geometric perturbations<br />

appear in the *RESPON section.<br />

.D1DIAG Neglect diagonal elements of the orbital Hessian when generating trial vectors.<br />

Mainly for debugging purposes.<br />

.DONEXT Force the use of optimal orbital trial vectors in the solution of the geometric<br />

response equations as described in Ref. [22]. This is done by solving the orbital part<br />

exact while keeping the configuration part fixed.<br />

.MAX IT<br />

READ (LUCMD,*) MAXNR

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