Thermal Behaviour of Some Yttrium (III)- Violurate Complexes and Crystal Structure of [Y(C4 H2 N3 O4)2 .4H 2 O]Cl Complex
(2004). Thermal Behaviour of Some Yttrium (III)- Violurate Complexes and Crystal Structure of [Y(C4 H2 N3 O4)2 .4H 2 O]Cl Complex. EKB Journal Management System, 27(1), 89-98. doi: 10.21608/ejs.2004.149315
. "Thermal Behaviour of Some Yttrium (III)- Violurate Complexes and Crystal Structure of [Y(C4 H2 N3 O4)2 .4H 2 O]Cl Complex". EKB Journal Management System, 27, 1, 2004, 89-98. doi: 10.21608/ejs.2004.149315
(2004). 'Thermal Behaviour of Some Yttrium (III)- Violurate Complexes and Crystal Structure of [Y(C4 H2 N3 O4)2 .4H 2 O]Cl Complex', EKB Journal Management System, 27(1), pp. 89-98. doi: 10.21608/ejs.2004.149315
Thermal Behaviour of Some Yttrium (III)- Violurate Complexes and Crystal Structure of [Y(C4 H2 N3 O4)2 .4H 2 O]Cl Complex. EKB Journal Management System, 2004; 27(1): 89-98. doi: 10.21608/ejs.2004.149315

Thermal Behaviour of Some Yttrium (III)- Violurate Complexes and Crystal Structure of [Y(C4 H2 N3 O4)2 .4H 2 O]Cl Complex

Egyptian Journal of Solids
Article 8, Volume 27, Issue 1, 2004, Page 89-98  XML PDF (360.34 K)
DOI: 10.21608/ejs.2004.149315
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Abstract
The title compounds were prepared by mixing either aqueous and / or
ethanolic solutions of YCl3.6H2O and violuric acid monohydrate in mole ratio
(1:2). The prepared crystalline complex belongs to orthorhombic system, with
unit cell constants: a = 8.6925(4), b = 17.0421(9), c = 5.5285(3) Å, V =
818.98(7) Å3, Z = 2, space group P21 21 2 (half the molecule occupies the
asymmetric unit cell). The structure was solved by direct method using SIR 92
software and then refined by full matrix least square using anisotropic
temperature factors. The hydrogen atoms were located and their positions and
isotropic temperature factors were refined giving R-factor 0.061 and wR 0.134.
The thermogravimetric analyses for the prepared complexes were studied under
nitrogen gas and the activation energies of decomposition steps were
determined.
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