ChemDoodle 2D has been updated.
The main focus is expanded support for inorganic compounds and complexes, including haptic bonds and multi-center attachments, their use in formula and mass calculations, and perspective ring templates. This is part of the continuing aim to build new capabilities for inorganic chemistry.
Additional highlights include expanded SMARTS support, automatic lone pair placement, a new pKa estimator, and numerous improvements to drawing, tables, rendering and file exchange. This update also includes a number of bug fixes.
Full details are available here https://ichemlabs.com/news/read?post=cd2d12_12_released