
%0 Journal Article
%A Engelhardt, LM 
%A Figgis, BN 
%A Sobolev, AN 
%A Reynolds, PA 
%T Structures of Some Complexes Containing the Re<sup>IV</sup>Cl<sub>4</sub> Unit
%J Australian Journal of Chemistry
%D 1996/04/01
%V 49
%N 4
%P 489-496
%K 
%R https://doi.org/10.1071/CH9960489
%U https://www.publish.csiro.au/paper/CH9960489 
%X The X-ray crystal structure determinations of five complexes of rhenium(IV) containing the ReCl4L2 unit, with L monodentate , are reported, one at 92 K. They are: (1) cis -( HNCMeNHPh )2ReCl4, Pccn , a 21.677(4), b 7.253(1), c 12.470(2) &#506;, R1(2&#963;) 0.0217, Rw 0.0473; (2) the di ( acetonitrile ) solvate of (1), P&#299; , a 10.005(2), b 12.120(2), c 12.744(2) &#506;, &#945; 72.19(1), &#946; 67.65(1), &#947; 90.95(1)&#176;, R1(2&#963;) 0.0311, Rw 0.0819; (3) cis -(HN= CMeNH (p-C6H4Me))2ReCl4, Pna21, a 12.782(2), b 8.237(1), c 21.279(3) &#506;, R1(2&#963;) 0.0497, Rw 0.1066; (4) cis-( thf )2ReCl4, P 212121, a 7.785(2), b 12.666(4), c 14.253(5) &#506;, R1(2&#963;), 0.0326, Rw 0.0827; and (5) trans-(Me2PhP)2ReCl4, P 21/c, a 9.701(2), b 13.739(6), c 8.324(2) &#506;, &#946; 106.83(2), R1(2&#963;) 0.0241, Rw 0.0613. The Re-Cl bond lengths in these and six other ReIVCl4L2 octahedral complexes are compared, and no distinct trans-effect of the donor atom on the chlorine atoms is seen either where L is monodentate as in our compounds or where L2 is a chelate ligand, as in the examples from the literature, although the results are much less clear there. 
