
TY  - JOUR
A1  - Semenova, Lioubov I. 
A1  - White, Allan H. 
T1  - Structural Systematics of Rare Earth Complexes. XIV Hydrated 1 : 1 Adducts of Lanthanoid(<emph type="6">III</emph>) Nitrates with 2,2&#8242;:6&#8242;,2&Prime;-Terpyridine
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1999
VL  - 52
IS  - 6
SP  - 507
EP  - 518
KW  - 
UR  - https://doi.org/10.1071/CH98045 
N2  - Room-temperature single-crystal X-ray structure determinations are recorded for (hydrated) lanthanoid(III) nitrate/2,2&#8242;:6&#8242;,2&Prime;-terpyridine (&#8216;tpy&#8217;) (1 : 1) complexes; all are of the form Ln(NO3)3/tpy/H2O(1 : 1 :x), &#91;(tpy)Ln(O2NO)2(OH2)y&#93;(NO3)(.z H2O), and form two series of compounds. For Ln = La(-)Gd, the complexes are &#91;(tpy)Ln(O2NO)2(OH2)3&#93;(NO3), the lanthanoid atom being ten-coordinate; crystals are triclinic, P 1, a &#x2248; 11&#183;8, b &#x2248; 11&#183;3, c &#x2248; 8&#183;9 &#197;, &#945; &#x2248; 75, &#946; 69, &#947; &#x2248; 89&#176;, Z = 2 f.u., conventional R on &#124;F&#124; 0&#183;045, 0&#183;062 for No 4513, 2710 independent &#8216;observed&#8217; (I &#62; 3&#963;(I)) diffractometer reflections for Ln = La, Gd respectively. For Ln = Tb(-)Lu, a different form is found: monoclinic, P 21/c, a &#x2248; 8&#183;8, b &#x2248; 11&#183;5, c &#x2248; 23&#183;8 &#197;, &#946; &#x2248; 111&#176;, Z = 4, R 0&#183;055, 0&#183;037, 0&#183;056 for No 2427, 3079, 1857 for Ln = Tb, Lu, Y respectively, the form of the complex being &#91;(tpy)Ln(O2NO)2(OH2)2&#93;(NO3).2H2O, with nine-coordinate lanthanoid. Crystallization of the Ln = La adduct from methanol yields an adduct of La(NO3)3/tpy/MeOH (1 : 1 : 2) &#91;(tpy)La(O2NO)3(HOMe)2&#93; stoichiometry with 11-coordinate lanthanum. Crystals are triclinic, P 1, a 12&#183;361(2), b 12&#183;244(3), c 7&#183;753(2) &#197;, &#945; 96&#183;56(2), &#946; 103&#183;22(2), &#947; 91&#183;16(2)&#176;, Z = 2, R 0&#183;037 for No 6597. 
ER  -

