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'Thioureas' in keywords

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1	Author	G. N. Chekhova, S. D. Goren, JuH. Krieger, D. Linsky, V. Lusternik, A. M. Panich, A. R. Semenov, A. Voronel	Requires cookie*
	Title	Specific Heat and Nuclear Quadrupole Resonance Study of Thiourea-Hexachloroethane Inclusion Compound
	Abstract	Specific heat and 35 C1 nuclear quadrupole resonance (NQR) measurements of the channel thio-urea-hexachloroethane inclusion compound are presented. Experimental NQR data confirm the results of atom-atom potential calculations that the guest sublattice comprises two types of nearly commensurate finite molecular chains, having different structure and separated by domain walls. Specific heat measurements show phase transition near 96 K.
	Reference	Z. Naturforsch. 55a, 335—338 (2000); received August 23 1999
	Published	2000
	Keywords	NQR, Specific Heat, Inclusion Compound, Thiourea, Hexachloroethane
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	TEI-XML for	default:Reihe_A/55/ZNA-2000-55a-0335.pdf
	Identifier	ZNA-2000-55a-0335
	Volume	55

2	Author	Cyril Párk, M. Ohammed, A. Al-Salamah	Requires cookie*
	Title	Thermal Decomposition of Aromatic Thioureas [1]
	Abstract	T herm al decomposition of aromatic and heteroarom atic thioureas in boiling chlorobenzene is a first-order reaction. The reaction involves intram olecular hydrogen transfer followed by a cleav age of the C -N bond which is the rate-limiting step. The rate constants of decom position have been determ ined and correlated with quantum -chem ical reactivity indices.
	Reference	(Z. Naturforsch. 41b, 101 [1986]; received August 14 1985)
	Published	1986
	Keywords	Thioureas, Isothiocyanates, Thermal D ecom position, Side-Chain Elim ination, Kinetics
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	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0101.pdf
	Identifier	ZNB-1986-41b-0101
	Volume	41

3	Author	Oliver Seidelmann, Lothar Beyer, Rainer Richter	Requires cookie*
	Title	N,N-Disubstituierte N'-Ferrocenoylthioharnstoffe als zweizähnige Komplexliganden für Übergangsmetallionen. Kristallstruktur von Bis-(N,N-diethyl-N'-ferrocenoylthioureato)nickel(II) N,N-Disubstituted N'-Ferrocenoyl Thioureas as Bidentate Ligands for Transition Metal Ions. Crystal Structure of Bis-(N,N-diethyl-N'-ferrocenoylthioureato)nickel(II)
	Abstract	N,N-diethyl-N'-ferrocenoyl-thiourea and N-(morpholino-thiocarbonyl)ferrocenecarboxylic amide have been prepared by the reaction of ferrocenoyl chloride with potassium thiocyanate and the respective amine in dry acetone. These bidentate ligands yield neutral heterometal-lic complexes with Ni(II), Cu(II), Mn(II) and Co(III). The dark brown air stable crystals of bis-(N,N-diethyl-N'-ferrocenoylthioureato)nickel(II) were characterized by X-ray structure de termination. Lattice dimensions: a = 1870.9(1), b = 1161.5(1), c = 1491.4(1) pm; space group Pca2!, Z = 4, R = 0.030 for 5707 observed reflections.
	Reference	Z. Naturforsch. 50b, 1679—1684 (1995); eingegangen am 23. März 1995
	Published	1995
	Keywords	Ferrocene Complexes, Thiourea, Hetero Metal Complexes, Synthesis, Crystal Structure
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	TEI-XML for	default:Reihe_B/50/ZNB-1995-50b-1679.pdf
	Identifier	ZNB-1995-50b-1679
	Volume	50

4	Author	Frank Leßmann3, Lothar Beyer3, Rainer Richter3, Reinhard Meusingerb	Requires cookie*
	Title	N-Benzoylthiocarbamoyl Amino Acid Ethyl Esters as Chelate Ligands for Transition Metal Ions
	Abstract	The reactions of benzoyl isothiocyanate with amino acid ethyl esters (N-butyl glycine ethyl ester, (S)-(-)-proline ethyl ester) give N-benzoylthiocarbamoyl amino acid ethyl esters. Apart from the expected N-benzoylthiocarbamoyl (S)-(-)-proline ethyl ester the racemic N-benzoyl thiocarbamoyl (/?)/(S)-proline ethyl ester is formed because of base catalyzed racemization of the educt (5')-(-)-proline ethyl ester during the reaction of (S)-(-)-proline ethyl ester hy drochloride with triethylamine. The structures of both compounds were established by X-ray crystal structure analysis and specific optical rotation measurements. The ligands yield neutral 2:1 chelates with Ni , Cu11, Pd11 and Pt11. The carboxylic oxygen atoms are not involved in the chelation. The ligands and the resultant complexes show configurational E/Z isomerism. In the case of the chelates of the racemic N-benzoylthiocarbamoyl (/?)/(5)-proline ethyl ester, additional R/S isomerism is observed as shown by
	Reference	Z. Naturforsch. 53b, 981—990 (1998); received November 11 1997
	Published	1998
	Keywords	Thioureas, Amino Acid Ethyl Esters, Chelates, NMR Data, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0981.pdf
	Identifier	ZNB-1998-53b-0981
	Volume	53

5	Author	L. Guibé, A. Péneau, M. Gourdji, A. Panich	Requires cookie*
	Title	Thiourea and Thiourea Inclusion Compounds. A 14 N NQR Investigation
	Abstract	A reinvestigation of the nitrogen-14 NQR in thiourea has permitted to record, apparently for the first time, the resonances above 169 K. The first order and second order of the transitions at 169 K and 202 K, respectively, appear clearly from the temperature dependence of the resonance frequencies; the mod-ulated structure, incommensurate or commensurate, is also seen on the 14 N NQR spectrum. This study is the first step of a new investigation of thiourea and its inclusion compounds.
	Reference	Z. Naturforsch. 55a, 331—334 (2000); received October 13 1999
	Published	2000
	Keywords	Thiourea, Nitrogen-14 NQR, Phase Transitions, Commensurate, Incommensurate Modu-lations, Inclusion Compounds
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	TEI-XML for	default:Reihe_A/55/ZNA-2000-55a-0331.pdf
	Identifier	ZNA-2000-55a-0331
	Volume	55