PIN (Preferred IUPAC Name) in addition to Traditional IUPAC naming, more nomenclature systems including thorough Improperly drawn rectangular geometry warnings are no longer flagged in rings of size 3 or 4.ĬhemDoodle 2D v11.12.0 is a feature update with a focus on IUPAC naming.A rounding error occured when rendering 4 membered rings with double bonds in certain style sheets, leading to only one side being fit correctly, this has been resolved.Lewis dot structures were incorrectly output with 60 degree angles for certain atom centers with 4 substituents, this has been rectified.Fixed issue where charges were no longer rendered after using the graph reduction functions.Corrected issue where in certain cases involving double bonds in multiple equivalent rings, the second bond line would be locked in place and could not be flipped to the other side.Minor improvements to JDX spectra input and much faster output to JDX format for simulated NMR spectra.Improvements to congested spiro structure layout.Significant speed improvements for generating isotopic distributions.This option is found in the Preferences window, under the Functions tab in the Stereochemistry section. The MDL/BIOVIA stereochemical drawing interpretation algorithm is now implemented along side the IUPAC specification for input drawing interpretation only (the IUPAC specification will always be used for output when using ChemDoodle functions).A new chapter 15 in the user guide focuses solely on stereochemistry discusses all of these features in detail. Assign 'R', 'S', 'E', 'Z', 'M', 'P' and the pseudo-asymmetric 'r', 's', 'e', 'z', 'm' and 'p' descriptors with a simple menu function. al., the CENTRES library by John May is included which supports advanced and consistent CIP assignment for all stereochemical features supported by ChemDoodle. A new advanced CIP descriptor engine has been implemented.Several issues have also been corrected, described below.

We believe ChemDoodle is now the industry leader for handling stereochemistry, especially in 2D drawings.

A new advanced CIP descriptor engine is implemented for the most accurate and consistent CIP assignments and the MDL/BIOVIA stereochemical drawing interpretation algorithm is now implemented along side the IUPAC specification. ChemDoodle 2D v11.13.0 is a feature update wrapping up our latest massive work on stereochemistry.

Chem doodle 3d