Synthesis, characterisation and study of mercury(II) chloride complexes with triphenylphosphine and heterocyclic thiones. The crystal structures of [(benzothiazole-2-thionato)-(benzothiazole-2-thione)(bis-triphenylphosphine) chloro mercury(II)] and [(mu(2)-dichloro) {(bis-pyrimidine-2-thionato)-mercury(II)} {(bis-triphenylphosphine)mercury(II)}] at 100 K

 
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2000 (EN)
Synthesis, characterisation and study of mercury(II) chloride complexes with triphenylphosphine and heterocyclic thiones. The crystal structures of [(benzothiazole-2-thionato)-(benzothiazole-2-thione)(bis-triphenylphosphine) chloro mercury(II)] and [(mu(2)-dichloro) {(bis-pyrimidine-2-thionato)-mercury(II)} {(bis-triphenylphosphine)mercury(II)}] at 100 K (EN)

Hadjikakou, S. K. (EN)

Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας (EL)
Hadjikakou, S. K. (EN)

Direct reaction of mercury(II) chloride with triphenylphosphine (PPh3) and benzothiazole-2-thione (bzthtH) in the molar ratio of 1:1:2 results in the formation of the [Hg(PPh3)(bzthztH)(bzthzt)Cl] (1) (bzthzt = the anion of benzothiazole-2-thione) while the reaction of mercury(II) chloride with triphenylphosphine (PPh3) and pyrimidine-2-thione (pmtH) in the molar ratio of 1:1:1 gives [Hg2Cl2(PPh3)(2)(pmt)(2)] (2) (pmt = the anion of pyrimidine-2-thione). The complexes have been characterised by their elemental analyses, melting points and their FTIR, far-IR spectroscopic data. The crystal structure of complex 1 which has: been determined by single-crystal X-ray crystallography at r.t. reveals that the molecule is monomeric with tetrahedral geometry around the metal ion. A benzothiazole-2-thione molecule and a benzothiazole-2-thionato anion are coordinated, via sulfur atoms, to the mercury(II) ion [Hg-S(ZA)= 2.726(2) and Hg-S(2)= 2.419(2) Angstrom]. A triphenylphosphine molecule is also coordinated through a phosphorus atom to the metal ion [Hg-P = 2.453(2) Angstrom] while the tetrahedral geometry around the mercury is completed by a chlorine atom [Hg-Cl= 2.633(2) Angstrom]. The complex is covalent in the solid state. The crystal structure of complex 2 which has also been established by single-crystal X-ray crystallography at 100(1) K shows that the molecule is binuclear and consists of two different moieties with tetrahedral geometry around each mercury(II) ion. One moiety consists of a mercury(II) ion with two phosphorus atoms from phosphine ligands and two bridging chlorine atoms, while the other consists of a mercury(II) ion and two sulfur atoms of pyrimidine-2-thionato ligands. The entire complex is covalent in the solid state. The two Hg(2)S(42) bond lengths are 2.3513(11) Angstrom while the two Hg(1)-P(1) bond lengths are 2.4826(9) Angstrom. The: two parts of the molecule are linked to each other by two chlorine atoms with Hg(1)Cl(1) and Hg(Z)-Cl(1) bond distances of 3.5310(10) and 3.0372(10) Angstrom, respectively. (C) 2000 Elsevier Science B.V. All rights reserved. (EN)

mercury(ii) complexes (EN)

Πανεπιστήμιο Ιωαννίνων (EL)
University of Ioannina (EN)

Polyhedron (EN)

English

2000

<Go to ISI>://000166064700017

Elsevier (EN)



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