ABSTRACT By reacting Ru(CO)_5 with the stoichiometric amount of Pt(C_7H_10)_3(C_7H_10< /SAMP>=bicyclo[2.2.1]heptene) in heptane and by removing the excess of CO, two polymorphs of Ru_4Pt_2(CO)_18, 1, were isolated and characterized by X-ray diffraction, namely the already known monoclinic (a) and a new orthorhombic (b) phase. Crystal data of the b phase: space group Pna2_1; a=17.738(3), b=15.596(2), c=10.357(1), V=2865 Å^3. IR spectra (Nujol mulls) of the two polymorphs are significantly different, while no difference was noticed in solution. The air-stable compounds quickly decompose in a carbon monoxide atmosphere giving Ru_3CO_12 and the unstable [Pt(CO)]_n, n&les;2.

A new polymorph of the heterometallic cluster Ru4Pt2(CO)18

CALDERAZZO, FAUSTO;LABELLA, LUCA;MARCHETTI, FABIO
2001

Abstract

ABSTRACT By reacting Ru(CO)_5 with the stoichiometric amount of Pt(C_7H_10)_3(C_7H_10< /SAMP>=bicyclo[2.2.1]heptene) in heptane and by removing the excess of CO, two polymorphs of Ru_4Pt_2(CO)_18, 1, were isolated and characterized by X-ray diffraction, namely the already known monoclinic (a) and a new orthorhombic (b) phase. Crystal data of the b phase: space group Pna2_1; a=17.738(3), b=15.596(2), c=10.357(1), V=2865 Å^3. IR spectra (Nujol mulls) of the two polymorphs are significantly different, while no difference was noticed in solution. The air-stable compounds quickly decompose in a carbon monoxide atmosphere giving Ru_3CO_12 and the unstable [Pt(CO)]_n, n⩽2.
Antonucci, V.; Arico', A. S.; Calderazzo, Fausto; Labella, Luca; Marchetti, Fabio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/176499
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