
%0 Journal Article
%A Waters, AF 
%A White, AH 
%T Synthesis and Structural Systematics of Nitrogen Base Adducts of Group 2 Salts. X. Some Mixed-Ligand Complexes of Group 2 Metal Halides With 2,2':6',2"-Terpyridine and Oxygen Donors
%J Australian Journal of Chemistry
%D 1996/01/01
%V 49
%N 1
%P 147-154
%K 
%R https://doi.org/10.1071/CH9960147
%U https://www.publish.csiro.au/paper/CH9960147 
%X Room-temperature single-crystal X-ray structural characterizations are recorded for a variety of adducts of Group 2 metal halides with 2,2':6',2?-terpyridine ( tpy ) from various hydroxylic solvents. [Mg( tpy )2][Mg( tpy )(OH2)3] Br4.PriOH (1) is triclinic, P&#299;, a 19.352(6), b 12.852(5), c 11.463(3) &#506;, &#945; 110.95(3), &#946; 99.04(2), &#947; 98.81(3)&#176;, Z = 2 f.u .; conventional R on &#1472; F &#1472; at convergence was 0.056 for No 4398 independent 'observed' (I > 3&#963;(I)) reflections. In the [Mg( tpy )2]2+ ion, Mg-N(central; distal) are 2.099(9), 2.09(1); 2.152(9)-2.212(8) &#506;, while in [Mg( tpy )(OH2)3]2+, Mg-N(central; distal) are 2.139(7); 2.206(9), 2.222(9) &#506;, while Mg-O trans to these are 2.042(6); 2.082(9), 2.097(8) &#506;. [Mg( tpy )(OH2)2( MeOH )] Cl2 (2) is triclinic, P&#299;, a 14.049(7), b 8.354(4), c 8.301(2) &#506;, &#945; 74.25(3), &#946; 73.05(3), &#947; 80.37(4)&#176;, Z = 2 f.u., R 0.064 for No 2417. In the cation, Mg-N(central; distal) are 2.125(4); 2.203(4), 2.218(4) &#506;; Mg-O( MeOH ) is trans to Mg-N(central), being 2.013(4) &#506;; Mg-O(OH2) are 2.067(4) and 2.063(4) &#506;. [CaCl2( tpy )( dmf )2 (3) ( dmf = N,N- dimethylformamide ) is monoclinic, C2/c, a 23.27(2), b 11.225(6), c 16.517(8) &#506;, &#946; 109.56(5)&#176;, Z = 4 centrosymmetric dimers, R 0.061 for No 985. The calcium atoms are linked by a pair of &#956;-chlorines, CaCl2Ca, and are seven-coordinate, N3Ca(&#956;-Cl )4 being broadly coplanar in the equatorial plane of a pentagonal bipyramidal array, with the other chlorine and the dmf oxygen trans and axial. 
