Anhydrous and hydrated [Co(en)2CO3]X salts as predictive guides for crystallization behavior in other systems

Gulraiz Hashmi, Ramy Hosny, Ivan Bernal, Roger A. Lalancette

Research output: Contribution to journalArticlepeer-review


The premise leading to this investigation was based on the following: if a class of compounds has desirable crystallization behavior(s), can one translate that information to related species whose behavior is not yet established, but which may be valuable scientifically and/or commercially? We explored that premise, and below present our results. Thus, since we noted that [CoN4(oxalato)]+ (N4 = di- or multi-dentate amine ligands) frequently crystallize in Sohncke space groups, sometimes with more than one molecule in the asymmetric unit, we decided to investigate the effect of replacing the oxalato ligand with a simple relative (carbonato) to determine if this held true. For that purpose, we examined a number of [Co(en)2carbonato]+ salts with various counter-anions and found that, as in the oxalato series, there were essentially two categories: anhydrous ones and hydrated ones, and that there were, indeed, some interesting common features in their crystallization modes, including important, identifiable hydrogen bonding interactions which are described below.

Original languageEnglish (US)
Pages (from-to)225-234
Number of pages10
JournalStructural Chemistry
Issue number1
StatePublished - Feb 2021

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


  • Carbonato ligands
  • Cobalt compounds
  • Conformational effects
  • Conglomerates
  • Crystallization pathways
  • Ethylenediamine ligands
  • Hydrogen bonds
  • Kryptoracemates
  • Molecular conformations and configurations
  • Molecular overlays
  • Oxalato ligands
  • Polymorphism
  • Value of Z’

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