ISSN:
0044-2313
Keywords:
Cobalt
;
terahedrane complexes
;
alkyne
;
phosphalkyne
;
bis(diphenylphosphanyl)amine
;
X-ray structure
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Chemistry of Polyfunctional Molecules. 119 [1]. Tetracarbonyl-dicobalt-tetrahedrane Complexes with the Ligands Bis(diphenylphosphanyl)-amine, 2-Butin-1,4-diol, and tert.-Butylphosphaacetylene - Crystal Structure of the Phosphaalkyne DerivativeCo2(μ-CO)2(CO)4(μ-Ph2P—NH—PPh2 - P,P′) · 1/2C6H5CH3 (4 · 1/2C6H5CH3) reacts with 2-butine-1,4-diol, HOCH2—C≡C—CH2OH (5), to the dark-red tetrahedrane complex Co2(CO)4(μ-η2,η2-HOCH2—C≡C—CH2OH—C2, C3) · (μ-Ph2P—NH—PPh2—P,P′) · THF (6 · THF). With t-butyl-phosphaacetylene, tBu—C≡P (7), 4 · THF forms Co2(CO)4(μ-η2,η2-tBu—C≡P)(μ-Ph2P—NH—PPh2—P,P′) (8), which also belongs to the tetrahydrane type. The compounds were characterized by their mass, IR, 31P{1H} NMR, 13C{1H} NMR, and1H NMR spectra. Crystals suitable for X-ray structure analyses have been obtained for 8 from dioxane. The dark red blocks crystallize in the monoclinic P21/c space group with the lattice constants a = 1404,1(5), b = 1330,0(7), c = 2578,8(10)pm; β = 90,82(3)°.
Notes:
Co2(μ-CO)2(CO)4(μ-Ph2P—NH—PPh2—P,P′) · 1/2C6H5CH3 (4 · 1/2C6H5CH3) reagiert in THF mit 2-Butin-1,4-diol, HOCH2—C≡C—CH2OH (5), zu dem dunkelroten Tetrahedran-Komplex Co2(CO)4(μ-η2,η2-HOCH2—C≡C—CH2OH—C2, C3) · (μ-Ph2P—NH—PPh2—P,P′) · THF (6 · THF). Mit tert.-Butyl-phosphaacetylen, tBu-C≡P (7), bildet 4 den ebenfalls im Zentrum tetraedrisch strukturierten Komplex Co2(CO)4(μ-η2,η2-tBu—C≡P)(μ-Ph2P—NH—PPh2—P,P′) (8). Die Verbindungen werden an Hand ihrer Massen-, IR-, 31P{1H}-NMR-, 13C{1H}-NMR- und 1H-NMR-Spektren charakterisiert. Für eine Röntgenstrukturanalyse geeignete Kristalle wurden von 8 aus Dioxan erhalten. Die dunkelroten Kristalle von 8 · 2C4H8O2 kristallisieren in der monoklinen Raumgruppe P21/c mit den Gitterkonstanten a = 1404,1(5), b = 1330,0(7), c = 2578,8(10) pm; β = 90,82(3)° aus.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19966220214
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