ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Contributions to the Chemistry of Phosphorus. 66. Crystal and Molecular Structure of 1,2,3,4-Tetraphenyl-cyclo-5-carba-1,2,3,4-tetraphosphane, (PC6H5)4CH2, and 1,4-Dithio-1,2,3,4-tetraphenyl-cyclo-5-carba-1,2,3,4-tetraphosphane, (PC6H5)4CH2S2The following results were achieved by X-ray structure analyses of 1,2,3,4-Tetraphenyl-cyclo-5-carba-1,2,3,4-tetraphosphane 1 and 1,4-Dithio-1,2,3,4-tetraphenyl-cyclo-5-carba-1,2,3,4-tetraphosphane 2: 1crystallises in the monoclinic space group Cc with a = 22.272, b = 13.726, c = 7.492 Å, β = 96.82° and Z = 4. The P4C-ring has an envelope conformation. The phenyl groups are arranged alternately on both sides of the ring.2forms triclinic crystals, space group P1, with a = 10.900, b = 10.663, c = 12.233 Å, α = 106.26, β = 100.04, γ = 70.65°, Z = 2. The P4C-ring has twist conformation, the carbon atom lies almost in the mean plane of the ring. The sulfur atoms are bonded in exo position to the phosphorus atoms neighbouring the carbon atom and in trans position to each other.
Notes:
Röntgenstrukturanalysen von 1,2,3,4-Tetraphenyl-cyclo-5-carba-1,2,3,4-tetraphosphan 1 und 1,4-Dithio-1,2,3,4-tetraphenyl-cyclo-5-carba-1,2,3,4-tetraphosphan 2 ergaben: 1kristallisiert in der monoklinen Raumgruppe Cc mit a = 22,272, b = 13,726, c = 7,492 Å, β = 96,82° und Z = 4. Der P4C-Ring liegt in der „envelope“-Konformation vor. Die Phenylgruppen sind alternierend auf beiden Seiten des Ringes angeordnet.2bildet trikline Kristalle, Raumgruppe P1, a = 10,900, b = 10,663, c = 12,233 Å, α = 106,26, β = 100,04, γ = 70,65°, Z = 2. Der P4C-Ring liegt in der Twist-Konformation vor; das C-Atom befindet sich nahezu auf der mittleren Ringebene. Die Schwefelatome sind exoständig an den dem C-Atom benachbarten Phosphoratomen gebunden und in trans-Postion zueinander angeordnet.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19774310105
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