MoCalc: A new graphical user interface for molecular calculations

Abstract

A new computer program called MoCalc (Molecular Calculations) has been designed to help the computational chemistry practitioner in the task of performing and analyzing molecular calculations. MoCalc is a graphical user interface for the MO calculation programs Gamess and Mopac, and uses Rasmol and Babel for molecule display and file conversion, respectively. In its initial version, MoCalc can execute the following operations: (a) create and handle Gamess and Mopac input files; (b) import any kind of molecular geometry supported by Babel and paste it as Cartesian, internal, or Gaussian-type coordinates on the input file; (c) convert Gamess and Mopac output files to inputs of both programs; (d) edit and validate the keywords that control the Gamess and Mopac calculation procedure; (e) display the input (Mopac) and output (Gamess and Mopac) molecular geometries; (f) run single or multiple (batch) calculations, either interactively or in background; (g) automatically open the output files as soon as the calculation finishes; (h) extract results from the output files, such as energy, charges, dipole, population analysis, wave function, bond orders, and valence analysis, and display them in spreadsheets; (i) calculate reactivity indices derived from the frontier orbital theory and the root-mean-square (rms) deviation of input and output geometries. All the results generated by MoCalc can be promptly transferred to text editors and electronic spreadsheets, which facilitate a detailed subsequent analysis and the publication of the results. MoCalc can also perform graphical and numerical comparative analysis of the some results when more than one output file is loaded. The program was coded in Visual Basic and runs in Windows 95/98/NT4/ME/2000/XP environments.

Квантовохімічне Дослідження Стеричного Впливу Замісника На Реакційну Здатність Третинних Амінів У Реакції З 2-(Хлорметил)оксираном

“…Квантовохімічне моделювання було здійснено засобами програмного комплексу PC GAMESS [30]. Побудова наближених вихідних структур досліджуваних об'єктів, створення вихідних файлів для різних типів розрахунку та візуалізація результатів моделювання проведені за допомогою графічного інтерфейсу MoCalc [31].…”

Cp2TiCl2: Synthesis, Characterization, Modeling and Catalysis

“…Students can clearly identify, based more so on quantity of peaks in the aforementioned regions rather than “hits” on the actual frequencies, that cyclopentadienyl rings are bound in a pentahaptic (η 5 ) fashion. Students can generate simulated IR spectra using MOCalc2012. , …”

“…Students can generate simulated IR spectra using MOCalc2012. 37,38 Mass spectra were additionally collected by students with comparisons made to simulated spectra (Figure 4). Excellent peak distribution alignments were seen between simulated (generated using SIS Isotope Distribution Calculator and Mass Spec Plotter) 39 and experimental spectra.…”

Theoretical investigation of nitric oxide interaction with aluminum phthalocyanine

“…The Fukui functions (f) were calculated according to equations [54,55]. These equations govern the nucleophilic, electrophilic, and radical attack, respectively.…”