Stereochemically active lone pairs of electrons in subvalent main fourth-group compounds. The crystal and molecular structures of {η5-C5H5Co[P(OC2H5)2O]3}2MII (M = Sn, Pb)
| Autor: | Jerold J. Zuckerman, W. Kläui, Elizabeth M. Holt |
|---|---|
| Rok vydání: | 1987 |
| Předmět: |
chemistry.chemical_classification
Chemistry Stereochemistry Organic Chemistry Crystal structure Biochemistry Inorganic Chemistry Metal Crystallography visual_art X-ray crystallography Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry Isostructural Single crystal Lone pair Inorganic compound Monoclinic crystal system |
| Zdroj: | Journal of Organometallic Chemistry. 335:29-42 |
| ISSN: | 0022-328X |
| DOI: | 10.1016/0022-328x(87)85171-9 |
| Popis: | The air-stable, mixed main group-transition metal, trinuclear sandwich oxygen tripod 2/1 complexes, {η 5 -C 5 H 5 Co[P(OC 2 H 5 ) 2 O] 3 } 2 M, ( 1 , M = Sn): C 34 H 70 Co 2 O 18 P 6 Sn, a 18.871(12), b 22.461(12), c 12.671(7) A, β 92.53(5)°, monoclinic space group P 2 1 / a , d calc 1.472 g cm −3 , Z = 4, R = 9.5%: 2 (M = Pb): C 34 H 70 Co 2 O 18 P 6 Pb, a 18.787(8), b 22.397(9), c 12.674(3) A, β 92,01(3)°, monoclinic space group P2 1 / a , d calc 1.594 gcm −3 , Z = 4, R = 7.2%, have been subjected to single crystal X-ray analysis. Both complexes show a stereochemically active lone pair at the metal and coordination to two tridentate η 5 -C 5 H 5 Co[P(OC 2 H 5 ) 2 O] 3 groups. The angles through the MO 6 units are CoMCo 149.04(14)° and 150.96(7)° for M = Sn and Pb, respectively. The tilting of the two tripod ligand moieties is reflected in the MO internuclear distances which range from 2.24(3) to 2.83 (3) A for M-Sn and 2.40 (2) to 2.66(3) A for M = Pb, differences of 0.59(3) and 0.26(3) A, respectively. The average distances are 2.48(3) and 2.51(2) A for 1 and 2 which are isostructural. |
| Databáze: | OpenAIRE |
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