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'l dicyanoethylene 2' in keywords
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1988 (1)
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1Author    Hans-U HummelRequires cookie*
 Title    Zur Darstellung und Kristallstruktur von Barium-l,l-dicyanoethylen-2,2-oxo-thiolat-Tetrahydrat — ein Salz mit dem Anion [0(S)CC(CN) 2 ] 2 " Synthesis and Crystal Structure of Barium-l,l-dicyanoethylene-2,2-oxo-thiolate Tetrahydrate — a Salt with the Anion [0(S)CC(CN) 2 ] 2 ~  
 Abstract    By reaction of COS with malonitrile in presence of potassium ethanolate in ethanol K 2 0(S)CC(CN) 2 • H : 0 is obtained. It reacts with Ba(NCS) 2 -3H 2 0 in ethanol to form colourless crystals of BaO(S)CC(CN) 2 • 4H : 0. The space group of the barium salt is Pn2,a (standard: Pna2,) with Z = 4. The structure consists of Ba 2+ and [0(S)CC(CN) 2 ] 2 ~ ions. The barium ion is bound to three nitrogen and six oxygen atoms. The coordination polyhedron is a tricapped trigonal prism. The anion [0(S)CC(CN) 2 ] 2 ~ is not exactly planar and is involved in several hydrogen bondings. 
  Reference    Z. Naturforsch. 40b, 722—725 (1985); eingegangen am 11. Februar 1985 
  Published    1985 
  Keywords    Barium-1, l-dicyanoethylene-2, 2-oxo-thiolate Tetrahydrate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0722.pdf 
 Identifier    ZNB-1985-40b-0722 
 Volume    40 
2Author    Hans-U Hummel, Hermann MeskeRequires cookie*
 Title    Über Verbindungen subvalenter Hauptgruppenmetallkationen mit Dithiolaten, 1. Mitteilung. Das dimorphe Blei(II)-l,l-dicyanoethylen-2,2-dithiolat: Darstellung und Kristallstrukturen Compounds of Subvalent Main Group Metal Cations with Dithiolates, 1. Contribution. Dimorphie Lead(II) l,l-Dicyanoethylene-2,2-dithiolate: Preparation and Crystal Structures  
 Abstract    By reaction of Pb(CH,COO) 2 -3 H 2 0 with Na 2 S 2 C=C(CN) 2 -3 H 2 0 in water, a-PbS 2 C=C(CN) 2 is obtained. Hydrothermal conditions give small crystals of the a-and /3-phase. The crystal structures of the two phases have been determined. The a-phase is monoclinic with space group P2Jn and a = 11.879(5), b = 12.027(5), c = 4.655(1) Ä, ß = 96.94(3)°, Z = 4. The compound contains PbS 2 C 4 N 2 molecules with Pb—S = 2.66 and 2.90 Ä. Two molecules are connected to dimers with Pb-Pb = 4.44 Ä. The /3-phase also crystallizes monoclinically, space group C2/c, a = 9.613(1), b = 13.579(1), c -16.052(2) Ä, ß = 98.36°, and Z = 12. There are two independent lead positions, with the metals integrated in PbS 2 C = C(CN) 2 groups with a stereochemically active lone-pair, and dimers Pb 2 (S 2 C 4 N 2) 2 with Pb-Pb distance = 3.80 Ä. 
  Reference    Z. Naturforsch. 43b, 389—398 (1988); eingegangen am 21. Dezember 1987 
  Published    1988 
  Keywords    Lead(II) l, l-Dicyanoethylene-2, 2-dithiolate, a-and /3-Phase, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0389.pdf 
 Identifier    ZNB-1988-43b-0389 
 Volume    43 
3Author    Z. NaturforschRequires cookie*
 Title    Über Erdalkalimetallverbindungen des l,l-Dicyanoethylen-2,2-dithiolats, III+ Die Kristallstruktur von SrS2C4N2 * 5 H20  
 Abstract    By reaction of CS2 with m aleonitrile in presence of sodium ethanolate in ethanol, N a2S2C4N 2 is obtained. SrS2C4N2-5 H 20 was synthesized by reaction of Sr(NCS) 2 with N a2S2C4N2 in ethanol. It crystallizes monoclinically, space group P2!/c, with a = 9.201(2), b — 9.990(6), c = 14.605(5) Ä,/3 = 122.3(3)°, Z = 4. The com pound is isotypical with CaS2C4N2-5 H 20 . A structural model based on equivalent metal positions was refined to R -0.057. The crystal structure contains layers of nearly planar [S2C = C (C N)2]2' anions held together by interspersed Sr2+ cations in a tricapped trigonal prismatic surrounding of 6 0 and 3N atoms. The S atom s of the ligand are not included in the coordination sphere of Sr2+ but are involved in several O — H -S hydrogen bonds. 
  Reference    Z. Naturforsch. 41b, 1206—1210 (1986); eingegangen am 1. April/26. Juni 1986 
  Published    1986 
  Keywords    Strontium -l, l-dicyanoethylene-2, 2-dithiolate P entahydrate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-1206.pdf 
 Identifier    ZNB-1986-41b-1206 
 Volume    41