Abstract
A new coordination polymer utilizing the neglected cyanoaurate anion [Au(CN)4]- building block is reported. Reaction of a Ni(II) salt, diethylenediamine (dien) and K[Au(CN)4] yields Ni(dien)[Au(CN)4]2, which consists of a unique bimetallic Ni(II)2/Au(III)2 supramolecular square through cis N(cyano) bridging of the [Au(CN)4]- building block to [Ni(dien)]2+ cations. These squares further aggregate into a 1-D chain via Au-N(cyano) interactions; no Au(III)-Au(III) interactions are observed. Within the square, the magnetic coupling between the Ni(II) centres is very weak, indicating that the [Au(CN)4]- unit is a poor mediator of magnetic exchange in this system.
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Dr. Daniel Leznoff completed his Ph.D. degree with Professor Michael Fryzuk in 1997 at the University of British Columbia (Vancouver, Canada). He was an NSERC Postdoctoral Fellow from 1997-1999 at the Bordeaux Institute for Condensed Matter Chemistry (ICMCB-CNRS) under the supervision of Professor Olivier Kahn. In 1999 he joined the Chemistry Department at Simon Fraser University (Burnaby, Canada), where he is now Associate Professor. His interests include the synthesis and characterization of gold and silver-containing heterometallic coordination polymers for materials applications, paramagnetic organometallic chemistry and actinide chemistry.
Ms. Carolyn Shorrock completed an M.Sc. thesis in the Leznoff group on cyano-gold(III) and -silver(I) coordination polymers in 2003 and is currently a Chemistry Lecturer at Langara College (Vancouver, Canada).
Dr. Raymond Batchelor is a Senior Lecturer at Simon Fraser University responsible for computer-assisted learning; he also spent many years as a crystallographer in conjunction with Prof. Frederick Einstein (SFU).
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Leznoff, D.B., Shorrock, C.J. & Batchelor, R.J. Coordination polymers with [Au(CN)4]- building blocks: a 1-d chain of molecular NiII 2AuIII 2 squares. Gold Bull 40, 36–39 (2007). https://doi.org/10.1007/BF03215290
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DOI: https://doi.org/10.1007/BF03215290
Keywords
- Coordination Polymer
- Cyano
- Supramolecular Coordination Polymer
- AUROPHILIC Interaction
- DICYANOAURATE