50964-97-1Relevant academic research and scientific papers
STRUTURAL CHARACTERIZATION OF 1,2,4,5-TETRAPHENYLCYCLO-3,6-DICARBA-1,2,4,5-TERAPHOSPHINE: A HIGHLY FOLDED CHAIR CONFORMATION
Laneman, Scott A.,Fronczek, Frank R.,Stanley, George G.
, p. 97 - 102 (2007/10/02)
The title compound crystallyzed in the monoclynic space group P21/c, with the followingunit cell parameters: a = 11.235(8), b = 8.473(2), c = 26.136(10) Aengstroem, β = 102.07(5) grad, V = 2432(3) Aengstroem3, Z = 4.1657 unique data were used to solve (direct methods) and refine the structure to give R = 0.126 and Rw = 0.118.The six-membered ring system is in a highly folded chair conformation with the phenyl group substituents on the phosphorous atoms oriented in the equatorial positions.The dihedral angles of the P-CH2-P plane with the P4 basal plane is a remarkable 101.8 grad (avarage).This dihedral angle is the closestto perpendicular ever observed for a monocyclic ring system.
