

Requires Mac OS X: 10.6, 10.7, 10.8, 10.9įieldAlign is a powerful design and 3D Structure Activity Relationship (SAR) tool for Computational and Medicinal Chemists that shows where active compounds are similar and how they differ. Visualise structure(s) in a CIF, including displacement ellipsoids.Select from a choice of CIF dictionaries and check against a user-customisable list of mandatory data items.Supplement the data in your CIF via two data entry wizards, one for publication details and the other for chemical, physical and crystallographic properties.

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* Full symmetry handling for linear molecules (otherwise up to D2h) * Single/Double Ionization energies and spectra at the ADC(3)/ADC(2x) level of theory. * Core excitation energies in the static exchange (STEX) approximation. * Up to quadratic response properties at the Hartree-Fock and DFT level * 2c BSS, the two-step exact two-component Hamiltonian (= DKH(infinity,0)) * 2c X2C, the one-step exact two-component Hamiltonian * 4c spin-free Dirac-Coulomb (scalar relativistic effects only) * 4c Dirac-Coulomb-Gaunt (includes also spin-other-orbit coupling) (only HF) * 4c Dirac-Coulomb (includes scalar relativistic effects and spin-own-orbit coupling) * expectation values/transition moments KRCI/GOSCI

* projection analysis of expectation values * visualization of unperturbed and perturbed densities * linear response functions at imaginary frequencies * KS response with noncollinear spin polarization and full derivative of functionals * 2c X2C+AMFI for 2-electron spin-orbit corrections (spin-same orbit/spin other-orbit) * intermediate Hamiltonian formalism for Fock-space CCSD * RELADC for correlated calculations of single/double ionization spectra New features in DIRAC10 (released 10/10/10) * New Lanczos algorithm for relativistic Algebraic Diagrammatic Construction (ADC)

* Atomic start guess for SCF calculations * Pipek-Mezey localization by trust-region optimization * Overlap diagnostic for TD-DFT calculations of excitation energies * Simple magnetic balance for NMR shieldings * London Atomic Orbitals (LAOs) at the DFT level * 2-component relativistic Effective Core Potentials (ECPs) The DIRAC program computes molecular properties using relativistic quantum chemical methods. Program for Atomic and Molecular Direct Iterative Relativistic All-electron Calculations
