Institute of Crystallography - CNR

OChemDB

OChemDb, the Open Chemistry Database, is a web portal aiming at providing statistical analysis of desired crystal-chemical information, specifically bond distances, bond angles, torsion angles, atom types and space groups. Its easy use supports the procedure for carefully checking the chemical bonding of a crystal structure. That is useful, e.g., for final assessing of the reliability of the solution of a new structure, for investigating the uncertain nature of a chemical bond, for estimating reasonable bond distances and angles to be used as chemical restraints in the refinement process.
OChemDb includes and uses a database which is built from the crystal-chemical information included in the free small-molecule database COD (The Crystallography Open Database; Gražulis et al., 2012; http://www.crystallography.net/cod/).

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Altomare, A., Corriero, N., Cuocci, C., Falcicchio, A., Moliterni, A. and Rizzi, R.
OChemDb: the free on-line Open Chemistry Database portal for searching and analyzing crystal structure information
J. Appl. Crystallog. (2018) 51, 1229-1236. doi:10.1107/S1600576718008166