
%0 Journal Article
%A Blount, JF 
%A Camp, D 
%A Hart, RD 
%A Healy, PC 
%A Skelton, BW 
%A White, AH 
%T The Synthesis and Structural Characterization of Mesityldiphenylphosphine, Dimesitylphenylphosphine and Trimesitylphosphine
%J Australian Journal of Chemistry
%D 1994/08/01
%V 47
%N 8
%P 1631-1639
%K 
%R https://doi.org/10.1071/CH9941631
%U https://www.publish.csiro.au/paper/CH9941631 
%X The synthesis and structural characterization of the tertiary phosphines mesityldiphenylphosphine [PPh2( mes )], dimesitylphenylphosphine [ PPh ( mes )2] and a new phase of trimesitylphosphine [P( mes )3] have been carried out. Crystals of PPh2( mes ) are monoclinic, space group P21/c, with a 10.252(10), b 9.847(11), c 17.444(7) &#506;, &#946; 99.78(6)&#176;, Z 4; R 0.059 for 2102 'observed' reflections. Crystals of PPh ( mes )2 are also monoclinic, space group P 21/c, with a 8.964(9), b 22.99(1), c 10.228(4) &#506;, &#946; 107.98(5)&#176;, Z 4; R 0.058 for 2350 'observed' reflections. The new phase of P( mes )3 is monoclinic, Cc, a 11.390(5), b 12.034(4), c 17.564(9) &#506;, &#946; 104.22(4)&#176;, Z 4 (R 0.060 for 1046 'observed' reflections), in which the molecule is disordered. A full report is given for the phase previously studied (triclinic), P&#299; , a 8.191(3), b 16.447(5), c 18.667(6) &#506;, &#945; 104.82(3), &#946; 97.74(3), &#947; 100.07(3)&#176;, Z 4; R 0.065 for 4964 'observed' reflections. The P-C bond distances are similar for the whole series of compounds with an average value of 1.833(1)&#506;. Introduction if the mesityl groups results in an increase of the C-P-C angles from c. 103 to c. 110&#176; with a concomitant flattening of the PC3 pyramid. 
