Di- and tri-nuclear osmium carbonyl chloride complexes: x-ray structures of Os2(CO)8Cl2 and Os3(CO)12Cl2 |
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Authors: | John R. Moss Margaret L. Niven Elizabeth E. Sutton |
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Affiliation: | (1) School of Chemical Sciences, University of Cape Town, Private Bag, 7700 Rondebosch, South Africa;(2) Present address: Victoria College Rusden Campus, Clayton, Victoria, Australia |
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Abstract: | Summary Os2(CO)8Cl2(1) is orthorhombic P212121 witha=9.3599(9),b=9.879(2),c=16.014(3), V=14803, Dc=3.03 Mgm–3 for Z=4. Structure solved by Patterson methods. Final R=0.038, Rw=0.038 [w=(2F)] for 1270 observed reflections and 141 parameters. Os3(CO)12Cl2(2) is monoclinic C2/m witha=12.105(3), b=10.612(3),c=8.798(1) , =117.02(2)°, V=10063, Dc=3.22 Mgm–3 for Z=2. Structure solved by Patterson methods. Final R=0.036, Rw=0.037 (w=(2F)–) for 821 observed reflections and 75 parameters.Complex(1) has an osmium-osmium single bond 2.897(1), with the chloride ligands in equatorial positions,(2) has a linear triosmium chain with osmium-osmium single bonds 2.893(1) and the chloride ligands occupy equatorial sites on the terminal osmium atoms. Both(1) and(2) are isostructural with their osmium carbonyl iodide analogues. |
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