
%0 Journal Article
%A Waters, AF 
%A White, AH 
%T Synthesis and Structural Systematics of Nitrogen Base Adducts of Group 2 Salts. IV. Some Complexes of Group 2 Halides With Ethane-1,2-diamine
%J Australian Journal of Chemistry
%D 1996/01/01
%V 49
%N 1
%P 61-72
%K 
%R https://doi.org/10.1071/CH9960061
%U https://www.publish.csiro.au/paper/CH9960061 
%X Syntheses and room-temperature single-crystal X-ray structure determinations are recorded for a number of adducts of ethane-1,2-diamine (en) with Group 2 metal salts, MX2.n(en). [Mg(en)3] Br2.MeOH (1) is monoclinic, P 21/c, a 9.067(5), b 15.161(4), c 14.839(8) &#506;, &#946; 121.86(5)&#176;, Z = 4 f.u .; R was 0.070 for No 1226 independent 'observed' (I > 3&#963;(I)) diffractometer reflections; [Mg(en)3] I2.MeOH (2) is triclinic, P&#299; , a 11.500(2), b 9.527(6), c 8.825(4) &#506;, &#945; 106.30(4), &#946; 100.57(3), &#947; 90.28(4)&#176;, Z = 2 f.u .; R 0.045 for No 3562. In (1) and (2), (Mg-N) are 2.20 and 2.19 &#506;. [Ca(en)4]Br2 (3) is orthorhombic, Fddd , a 28.54(1), b 15.863(7), c 8.927(9) &#506;, Z = 8 f.u .; Ca-N are 2.608(7) and 2.556(8) &#506;. [ Sr (en)4] Cl2.2MeOH (4) is also orthorhombic, Fddd , a 26.627(8), b 15.388(4), c 11.313(4) &#506;, Z = 8 f.u .; R 0.059 for No 535. [ Sr (en)4] Br2.2en (5) is tetragonal, I 41/a, a 9.215(7), c 27.678(3) &#506;, Z = 4 f.u ., R 0.044 for No 657. [ Sr (en)4]I2.MeOH (6) is tetragonal, I41/amd, a 9.389(1), c 28.78(1) &#506;, Z = 4. f.u ., R 0.040 for No 10. In (4), (5) and (6), Sr -N are 2.728(7), 2.718(7); 2.720(7), 2.703(7) and 2.75(2), 2.72(7) &#506;. [ ClBa (en)3(en)(2/2)](&#8734; &#1472; &#8734;) Cl (&#8801; BaCl2.4en) (7) is monoclinic, P 21, a 8.666(3), b 9.063(10), c 12.655(5) &#506;, &#946; 108.13(3)&#176;, Z = 2 f.u ., R 0.048 for No 1479. In (1) and (2), magnesium is six-coordinate [Mg(N,N'- bidentate )3]; (3)-(6), calcium and strontium are eight-coordinate [M(N,N'- bidentate )4]; in (7), barium is nine-coordinate, one of the en ligands being bridging so that the complex is a single-stranded polymer generated by the 21 screw. Ba-Cl is 3.419(5) &#506;, Ba -N bidentate en-N are 2.91(2)-2.97(3) &#506;, and Ba -N monodentate en-N 2.92(1), 3.15(1) &#506;. 
