Synthesis and X-ray structures of triphenylphosphine-mercury(II) thiosalicylate complexes: novel aggregation processes |
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| Authors: | William Henderson Brian K Nicholson |
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| Institution: | Department of Chemistry, University of Waikato, Private Bag 3105, Hamilton New Zealand |
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| Abstract: | Reaction of HgCl2(PPh3)2] with one equivalent of thiosalicylic acid (tsalH2, HSC6H4CO2H) and excess triethylamine, followed by recrystallisation from dichloromethane-diethyl ether gives the compound Hg2(tsal)2(PPh3)2] (2). This has a bis(S,O)-chelated mercury centre with a nido-trigonal bipyramidal coodination, with the four oxygens of the two carboxylates also coordinated to a Hg(PPh3)2 moiety. When a reduced quantity of pyridine was used as the base a different crystalline product was isolated. This was characterised as Hg2(tsal)2(PPh3)2]Hg(tsalH)2] (3), which contains the same Hg2(tsal)2(PPh3)2] moiety found for 2, co-crystallised with a Hg(tsalH)2]. The two mercury-thiosalicylate species are connected by means of O-H?O hydrogen bonding. |
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| Keywords: | Mercury Triphenylphosphine Thiosalicylate Crystal structure |
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