| | 1 | Author
| Hans-U Hummel, Hermann Meske | Requires 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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| default:Reihe_B/43/ZNB-1988-43b-0389.pdf | | | | Identifier
| ZNB-1988-43b-0389 | | | | Volume
| 43 | |
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