Solvent-dependent conformational polymorphism in the crystal structure of mercuric bromide adduct of 1,1′-bis(diphenylphosphino)ferrocene

Abstract

Two polymorphs of dinuclear mercury–iron complexes, [HgBr₂(dppf)] (1) where dppf is 1,1′-bis(diphenylphosphino)ferrocene, are prepared and crystal structures are determined by X-ray crystallography. The reaction of mercury(II) bromide with dppf in methanol–dichloromethane led to orange block polymorph. After crystallization of this complex in DMSO, a red needle polymorph was obtained.

Keywords:

• Polymorph
• 1
• 1′-Bis(diphenylphosphino)ferrocene
• Mercuric bromide
• X-ray Crystallography

Acknowledgment

We are grateful to the University of Tehran for financial support.