
TY  - JOUR
A1  - Harrowfield, Jack M. 
A1  - Sharma, Raj Pal 
A1  - Skelton, Brian W. 
A1  - Venugopalam, Paloth 
A1  - White, Allan H. 
T1  - Structural Systematics of 2/4-Nitrophenoxide Complexes of Closed-Shell Metal Ions. VI 4-Nitrophenoxides of Group 2
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1998
VL  - 51
IS  - 8
SP  - 775
EP  - 784
KW  - 
UR  - https://doi.org/10.1071/C97103 
N2  - Room-temperature single-crystal X-ray structure determinations are recorded for 4-nitrophenolate (4-np-) salts of Group 2 metal ions, variously hydrated, M(4-np)2.xH2O, M = Mg, Ca, Sr, Ba. Mg(4-np)2.8H2 O is monoclinic, P21/c, a 12&#183;402(3), b 6&#183;673(7), c 11&#183;833(6) &#197;, &#946; 93&#183;70(3)&#176;, Z = 2; conventional R on &#124;F&#124; was 0&#183;041 for No 1995 independent &#8216;observed&#8217; (I &#62; 3&#963;(I)) reflections. Ca(4-np)2.4H2O is monoclinic, P21/c, a 13&#183;109(8), b 3&#183;644(1), c 21&#183;181(8) &#197;, &#946; 125&#183;55(3)&#176;, Z= 2, R 0&#183;050 for No 1371. Sr(4-np)2.8H2O is monoclinic, P21/n, a 7&#183;934(1), b 10&#183;658(1), c 23&#183;602(2) &#197;, &#946; 91&#183;36(1)&#176;, Z = 4, R 0&#183;038 for No 2050. Ba(4-np)2.8H2O is monoclinic P21/c, a 15&#183;990(8), b 6&#183;337(3), c 25&#183;634(8) &#197;, &#946; 126&#183;1(3)&#176;, Z = 4, R 0&#183;021 for No 3115. The magnesium salt is ionic with &#91;Mg(OH2)6&#93;2+ cations and interleaved anion stacks up b. The calcium salt is a one-dimensional polymer with ... Ca(&#181;-O)2Ca(&#181;-O)2Ca ... spine, the bridges being phenolic oxygen atoms.trans-Coordinated water molecules make up six-coordination about the calcium, the anion planes stacking at the b spacing. The strontium adduct is also a one-dimensional polymer with a similar spine, but with water molecule oxygen atoms bridging, the nine-coordinate strontium environment being made up by a chelating nitro group and three unidentate water molecules. Coordinated anions stacked up a are interleaved by free anions. The barium salt is simply &#91;Ba(4-np)(OH2)8&#93;+ (4-np-), the ligand anion (semi)chelated through the nitro pair of oxygen atoms, again with interleaving anion/ligand stacking. 
ER  -

