Create 3D drawings using the same easy mouse and menu driven methods of ChemPen. ChemPen3D uses a modified version of the popular modified DREIDING molecular mechanics force field to optimize molecular geometry. ChemPen3D's force field has been extended to cover the entire periodic table thus allowing you to create metal complexes along with organic molecules. 

ChemPen3D Features:Mouse and Menu Driven Drawing Interface; Group, bond, atom, symbol and text editors; Extended DREIDING molecular mechanics force field for geometries; -bonding potentials; Fast geometry optimization; Estimate reaction enthalpy, entropy, free energy and equilibrium constant; Calculate molecular weight, formula and composition; Calculate strain energy, internal energy, dipole moment; New C-13 NMR Shift Prediction; Fourteen display modes for 3D structures; Pivot structure around atom or bond; Visualize with spinning, tumbling, wagging and rocking; Parallax stereo view; Display inter-atomic distance, bond angle, Bond length, and torsion angles; Save separate atomic coordinate and bond table file; Paste Drawings to Windows Word Processors; Online Help and Tutorial.