Chemistry of polyfunctional molecules. 119: Tetracarbonyl-dicobalt-tetrahedrane complexes with the ligands Bis(diphenylphosphanyl)-amine, 2-butin-1,4-diol, and tert.-butylphosphaacetylene - Crystal structure of the phosphaalkyne derivative

Article abstract of DOI:10.1002/zaac.19966220214

Co₂(μ-CO)₂(CO)₄(μ-Ph ₂P-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,η ²-HOCH₂-C≡C-CH₂OH-C²,C ³)· (μ-Ph₂P-NH-PPh₂-P,P′)·THF (6·THF). With t-butylphosphaacetylene, tBu-C≡P (7), 4·THF forms Co₂(CO)₄· (μ-η²,η²-tBu-C≡P)(μ-Ph ₂P-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, and ¹H 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)°. Johann Ambrosius Barth 1996.