Issue 6, 2014

Mechanochemical dehydrochlorination and chelation reaction in the solid state: from a molecular salt to a coordination complex

Abstract

We report the solid state structural transformation of a hydrogen bonded complex salt into a metal complex via dehydrochlorination using mechanochemistry. A crystalline salt containing a large and flexible bidentate dication hydrogen bonded to a tetrachlorometalate (II) anion has been ground in the presence of KOH. Substitution of charge-assisted hydrogen bonding interactions by coordination bonds via chelation has been demonstrated by single-crystal and powder X-ray diffraction analysis. By-product water molecules are included in the structure, playing an important role establishing electrostatic interactions. The irreversibility property of the transformation of the coordination complex into a hydrogen bonded complex salt was determined experimentally. Density functional calculations were used to attempt a rationalisation of the structural results into the mechanochemical reactions.

Graphical abstract: Mechanochemical dehydrochlorination and chelation reaction in the solid state: from a molecular salt to a coordination complex

Supplementary files

Article information

Article type
Paper
Submitted
19 Sept. 2013
Accepted
07 Okt. 2013
First published
08 Okt. 2013

CrystEngComm, 2014,16, 969-973

Mechanochemical dehydrochlorination and chelation reaction in the solid state: from a molecular salt to a coordination complex

F. Guo, H. Shao, Q. Yang, A. Famulari and J. Martí-Rujas, CrystEngComm, 2014, 16, 969 DOI: 10.1039/C3CE41900B

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