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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 17, Number 11
BKCSDE 17(11)
November 20, 1996 

 
Title
Tetrathiafulvalene (TTF) Charge Transfer Compounds with Some Heavier Transition Metal (Au, Pt, Ir, Os) Chlorides
Author
Chan-Kyou Jeong, Young-Inn Kim*, Sung-Nak Choi
Keywords
Abstract
The charge transfer compounds of tetrathiafulvalene (TTF) with the general formula of (TTF)mMCln, (M=Au, Pt, Ir, Os) were prepared by the direct reaction using excess HAuCl4·3H2O, H2PtCl6·xH2O, H2IrCl6·xH2O and H2OsCl6 respectively. The powdered electrical conductivities (σrt) at room temperature are given as follows; (TTF)3AuCl2, 4.53×10-3; (TTF)3.5AuCl2, 6.37×10-3; (TTF)3PtCl4, 5.51× 10-4; (TTF)2IrCl4, 2.40×10-5; (TTF)OsCl4· 1/2C2H5OH, 4.46×10-7 Scm-1. Magnetic susceptibility, electronic (UV-Vis.), vibrational (IR) and EPR spectroscopic evidences indicate that there is incomplete charge transfer from the TTF donor to gold, platinum, and iridium respectively, and that there is essentially complete charge transfer to osmium, thereby resulting a relatively low electrical conductivity in osmium compound. The EPR and magnetic susceptibility data reflect that the metals are in diamagnetic Au(Ⅰ), Pt(Ⅱ), Ir(Ⅲ), and Os(Ⅱ) oxidation states, and the odd electrons are extensively delocalized over the TTF lattices in each compound.
Page
1061 - 1065
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