
TY  - JOUR
A1  - Waters, AF 
A1  - White, AH 
T1  - Synthesis and Structural Systematics of Nitrogen Base Adducts of Group 2 Salts. VI. Mixed Oligodentate-Aliphatic-Base/Oxygen Ligand Adducts
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1996
VL  - 49
IS  - 1
SP  - 87
EP  - 98
KW  - 
UR  - https://doi.org/10.1071/CH9960087 
N2  - In the course of synthesizing oligodentate aliphatic nitrogen base adducts of Group 2 metal salts, a number of mixed- ligand species have been isolated with oxygen ligands , and characterized by room-temperature single-crystal X-ray studies. BaCl2.4en.H2O &#8801;[(en)4Ba(OH2)] Cl2 (1) is monoclinic, P 21/c, a 9.456(4), b 14.953(6), c 14.82(1) &#506;, &#946; 100.78(6)&#176;, Z = 4 f.u ., R 0.043 for No 1862 independent 'observed' (I > 3&#963;(I)) diffractometer reflections. Ba -N range between 2.900(9) and 2.97(1) &#506;, and Ba-O is 2.779(8) &#506; in the nine-coordinate BaN8O environment. CaCl2.2dien.H2O &#8801; [( dien )2Ca(OH2) Cl ] Cl (2) is monoclinic, P 21/c, a 10.808(4), b 11.999(4), c 15.71(1) &#506;, &#946; 123.58(4)&#176;, Z = 4 f.u ., R 0.050 for No 3134; CaBr2.2dien.2H2O &#8801; [( dien )2Ca(OH2)2] Br2 (3) is monoclinic, P 21/c, a 18.001(3), b 11.983(6), c 21.562(5) &#506;, &#946; 124.97(2)&#176;, Z = 8 f.u ., R 0.045 for No 2858; CaBr2.2dien.2MeOH &#8801; [( dien )2Ca( HOMe )2] Br2 (4) is orthorhombic, P212121, a 16.620(8), b 12.78(1), c 9.765(4) &#506;, Z = 4 f.u ., R 0.073 for No 878. In (2)-(4), the cation configurations are similar, being of the form [L2Ca( dien )2], L (L') being the unidentate  ligand, with the eight-coordinate calcium environments [L2Ca(N3)2] in a common isomeric configuration, the two ligands L being cis in an array of quasi-2 symmetry. Ca- Cl in (2) is 2.834(1) &#506;; Ca-N generally range between 2.52(5) and 2.64(1) &#506;; Ca-O(H2O) is 2.418(2) in (2), 2.434(7)-2.496(7) &#506; in (3), while Ca-O( MeOH ) in (4) are 2.43(2) and 2.43(2) &#506;. [Mg(HOMe)6] I2.2tmeda (5) ( tmeda = Me2N(CH2)2NMe2), orthorhombic, Pbca, a 23.423(8), b 15.306(4), c 9.345(1) &#506;, Z = 4 f.u ., R 0.052 for No 1928, provides a usefully precise description for the centrosymmetric cation, Mg-O being 2.069(4), 2.080(4), 2.096(5) &#506;, with Mg-O-C 128.4(4) l28.9(4), l29.7(4)&#176;. [( tmeda )SrI2 ( HOMe )3].&#189;tmeda (6), monoclinic, P 21/c, a 7.730(1), b 35.493(9), c 11.081(2) &#506;, &#946; 126.49(1)&#176;, R 0.042 for No 3161, has a seven-coordinate, quasi-pentagonal bipyramidal SrN2I2O3 array about the metal with trans-iodines. 
ER  -

