161265-03-8. Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 161265-03-8, Name is (9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine). In a document type is Article, introducing its new discovery.
Synthesis and characterization of a large bite angle xantphos iridium complex
The xantphos iridium complex [Ir(xantphos)(H)(CO)(PPh3)] CH 2CL2 (3) was synthesized and structurally characterized by NMR, IR, and single-crystal X-ray diffraction. Complex 3 crystallizes with two molecules (A,B) in the asymmetric unit. The coordination around Ir is trigonal bipyramidal with all three P groups occupying equatorial positions. The carbonyl and hydride occupy axial sites. This mode of bonding results in a complex that exhibited large bite (P1-Ir-P2) angles of 109.12(6) and 110.50(6) for the A and B molecules, respectively. NMR data further support the structural elucidation of 3 and IR data confirm the presence of Ir bound to both a carbonyl and a hydride. Thermal analyses of 3 indicate that it is thermally stable up to >400 C under nitrogen.
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Reference£º
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate