Conclusions
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1.
IR spectroscopy was used to study the interaction of Co2(CO)8 with SiO2, the surface of which was modified with mono- and polydentate ligands (Si-O)x-(OC2H5)4−x−n [(CH2)3PR2]n (R=Ph, Cy; n=1–3). It has been demonstrated that the Co2(CO)8 is fixed on phosphine-containing SiO2 with the formation of predominately monophosphine-substituted dicobalt carbonyl complexes on the surface of the support, which are transformed to the corresponding diphosphine-substituted complexes in the absence or in the presence of low pressures of CO.
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2.
It has been found that covalently fixed cobalt complexes are decarbonylated irreversibly when heated in vacuum. The preservation of a linkage between the decarbonylated CO particles and the phosphine ligands on the SiO2 surface prevents the formation of a metallic phase.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp 1286–1292, June, 1989.
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Moroz, B.L., Yurchenko, É.N., Likholobov, V.A. et al. IR spectroscopic study of the interaction of dicobalt octacarbonyl with phosphinized silica gel. Russ Chem Bull 38, 1171–1176 (1989). https://doi.org/10.1007/BF00957148
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DOI: https://doi.org/10.1007/BF00957148