ChemInform Abstract: LATTICE VIBRATIONAL MOTION IN TETRACYANOQUINODIMETHANE (TCNQ): A NITROGEN-14 NUCLEAR QUADRUPOLE RESONANCE STUDY (original) (raw)
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Chemische Berichte, 1991
Charge-transfer complexes / Electrical conductivity / Tetrathiafulvalenes / Tetracyanobenzoquinodimethane / Dicyanobenzoquinodiimine Multi-Step Redox Systems, LIV').-Conducting CT Complexes of Tetrathiafulvalene VTF) with Tetracyanobenzoquinodimethane (TCNQ) and N,N'-Dicyanobenzoquinodiimine (DCNQI)-A Comparison X-ray structure analysis and electrical conductivity together 2 HzO) are presented and compared with those of the wellwith ESR data of the CT complex DCNQI/TTF. 2 HzO (3/2. known TCNQ/TTF (1/2), Fur die Unterstiitzung dieser Arbeit danken wir der Stftung Volkswagenwerk, der BASF AG, LudwigshafenIRhein, sowie dem Fonds der Chemischen Industrie, der zusatzlich P.E. ein Promotionsstipendium gewahrte.
Chemische Berichte, 1991
Multi-Step Redox Systems, LVI').-Crystal Structures and Conductivities of the CT Complexes TTF/2-X-5-Me-DCNQI (X = C1. Br, I) from Tetrathiafulvalene and 2-Halogeno-N,N'-dicyano-5-methyl-l,4-benzoquinone Diimine In contrast to microcrystalline powders single crystals of the ment of donor and acceptor molecules within the crystal lattitle complexes show low conductivities ((T < These properties are based on a peculiar mixed stack arrange-Scm-I). tice (space group PZ,/n). 1. Elektrische Leitfahigkeiten einiger TTFDCNQI-Komplexe U Abb. 3. Kristallpackung in der Elementarzelle von TTF/2-Br-5-Me-DCNQI, Blickrichtung parallel zur a,c-Ebene, ungeordnete CHJ Br als Kugeln gleicher GroDe dargestellt
Zeitschrift für Naturforschung B, 1992
Ein neuer Zugang zu Tetrathiooxalaten. Die Kristallstruktur von (NEt4)2[C2S4] A N ovel Access to T etrathiooxalates. C rystal S tructure o f (N E t4)2[C2S4] A lfred D. Bacher, Irin a Sens und U lrich M üller* Fachbereich Chemie der Universität Marburg, Hans-M eerwein-Straße, D-W-3550 Marburg Z. Naturforsch. 47b, 7 0 2-7 0 5 (1992); eingegangen am 21. Oktober 1991 Tetraethylammoniun Pentasulfide, Tetraethylammonium Tetrathiooxalate, Benzyltriethylammonium Tetrathiooxalate, Crystal Structure (N E t4)2S5 was prepared from N E t4Cl and N a 2S4 in ethanol. Its reaction with boiling acetonitrile yielded tetraethylammonium tetrathiooxalate. (N E t4)2[C2S4] was also obtained by heating (N E t4)2S5 with tetraethylammonium dithioacetate in ethanol. Benzyltriethylammonium tetra thiooxalate, (N E t3Bz)2[C2S4] • 2 toluene, crystallized after N E t3BzCl and N a 2S4 were heated in acetonitrile on subsequent addition o f toluene. The crystal structure o f (N E t4)2[C2S4] was de termined by X-ray diffraction (454 independent observed reflexions, R = 0.047). Crystal data: tetragonal, a = 871.2(1) pm, c = 1566.0(3) pm, space group P 4 2/nmc, Z = 2. The [C2S4]2-ion has point symmetry 4 m 2 (D 2d), i.e. the dihedral angle between the two CS2 groups is 90°. The ethyl groups o f the N E t4+ ions are disordered in two orientations.
Chemische Berichte, 1990
Reactions of 2.2,4,4-Tetrakis(trifluoromethyl)-1.3-dithfetane phosphane Gold(1) Complex of a Thiazoline-4-thiolate 2,2,4,4-Tetrakis(trifluoromethyl)-1,3-dithietane (1) reacts with KNCS to yield the potassium salt of 4-mercapto-2,2,5,5-tetrakis(trifluoromethy1)-A3-thiazoline (2). An oxidative workup procedure results in the formation of the disulfide 6. The salt 2 reacts with methyl bromoacetate, benzyl bromide, 3-bromo-1 -phenylpropene, and 1,3-diiodopropane to form the thioethers 3-5 and 7, respectively. Protonation of 2 results in the formation of the thio-with KNCS and KNCO -Crystal Structure of a Triphenyllactam 9. Disulfide 6 reacts with C12 in the presence of FeC13 to yield the sulfenyl chloride 8. C-S bond formation (410) is observed by treating 8 with Me,SiCN. The gold(1) complex 11 is formed from 2 and Ph,PAuCI. 11 crystallizes in the monoclinic space group P2!/n and contains a linear P-Au-S unit. The reaction of 1 with KNCO leads after protonation to the perfluorinated lactam 12 and the cyanuric acid derivative 13.