
%0 Journal Article
%A Lim, Kevin C. 
%A Skelton, Brian W. 
%A White, Allan H. 
%T Crystal Structures of the ('Maximally') Hydrated Scandium Halides, ScX<emph type="8">3</emph>.<emph type="2">n</emph>H<emph type="8">2</emph>O (X = Cl, Br, I)
%J Australian Journal of Chemistry
%D 2001/04/05
%V 53
%N 10
%P 875-878
%K Scandium; crystal structures.
%R https://doi.org/10.1071/CH00120
%U https://www.publish.csiro.au/paper/CH00120 
%X Low-temperature single-crystal X-ray structure determinations are recorded for the (&#8216;maximally&#8217;) hydrated scandium(III) trihalides, ScX3.nH2O (X = Cl, Br, I). The chloride and bromide are isomorphous heptahydrates (n =7), ScX3.7H2O =&#91;Sc(OH2)7&#93;X3, monoclinic, space group P2/n, a ~ 7.6, b ~ 7.7, c ~ 9.6 &#197;, &#946; ~ 99&#x02DA;, Z = 2, R 0.051, 0.039 for No 1253, 1339 &#8216;observed&#8217; (F &#62; 4&#963; (F)) reflections, respectively, the metal atom disposed in a homoleptic environment of seven water molecule oxygen atoms arranged in an essentially pentagonal-bipyramidal disposition, site symmetry 2, Sc&#8211;O(axial) 2.095 &#197;, Sc&#8211;O(eq) 2.157(3)&#8211;2.209(4) &#197;. The iodide is an octahydrate, ScI3.8H2O =&#91;Sc(OH2)7&#93;I3.H2O, monoclinic P21/c, Z = 4, R 0.022 for No 3243; the seven-coordinate metal atom environment here is well distorted from the pentagonal-bipyramidal norm, the largest angle in the coordination sphere being 162.4(1)&#x02DA;, subtended by Sc&#8211;O 2.109(3), 2.128(3) &#197;, the remaining Sc&#8211;O ranging between 2.157(3)&#8211;2.219(3) &#197;. 
