
TY  - JOUR
A1  - Mason, R 
A1  - Williams, GA 
T1  - The crystal structure of solvated Pt[CH<sub>3</sub>C(CH<sub>2</sub>PPh<sub>2</sub>)<sub>3</sub>][P(C<sub>6</sub>H<sub>4</sub>F)<sub>3</sub>]
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1981
VL  - 34
IS  - 3
SP  - 471
EP  - 477
KW  - 
UR  - https://doi.org/10.1071/CH9810471 
N2  - The molecular structure of the compound Pt(tripod)P(C6H4F)3&#189;C4H8O where tripod = CH3C- (CH2PPh2)3, has been determined by single-crystal X-ray diffraction methods at 295 K. Crystals are triclinic, space group P1. Z 2, a 13.497(1), b 14.803(2), c 13.898(2) A, &#945; 91.914(7), &#946; 102.304(6), &#947; 97.319(6)&#176;. Diffractometry (Mo K&#945;) has provided significant [I &#8805; 3&#963;(I)] Bragg intensities for 9528 independent reflections within 0 < (sin &#952;;)/&#955; &#8804; 0.705 &#506;-1.The structure has been refined by least-squares methods to R 0.040. The coordination of the zero-valent platinum atom is distorted tetrahedral with three Pt-P bonds, of lengths 2.292(1), 2.297(1), 2.303(1) &#506;, to phosphorus atoms of the tripod ligand, and a fourth Pt-P(C6H4F)3 bond of length 2.261(1) &#506;. The P-Pt-P bond angles involving the phosphorus atom of the monodentate ligand are large [118.23(5), 127.18(6), 122.20(5)&#176;], whereas the steric constraints related to the tripod ligand are reflected in the other P-Pt-P bond angles, none of which are very different from 90&#176; [91.26(5), 99.56(5), 90.79(5)&#176;]. We suggest that the short Pt-P(C6H4F), bond is qualitatively explained by greater 's' electron character in the metal &#963; orbital used in bonding with the monodentate ligand, and conversely more 'p' electron character in the platinum &#963; orbitals used in bonding with the tripod ligand. We discuss the lack of significant evidence for platinum to phosphorus &#960;-bonding effects in the observed Pt-P bond lengths. 
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