Cobalt carbonyl organosilicon gels based on 3-aminopropyltriethoxysilane, dicobalt octacarbonyl, and tetraethoxysilane

Cobalt carbonyl organosilicon gels [(O1.5SiCH2CH2CH2NH2)(6)Co][Co(CO)(4)](2 ).(O1.5SiCH2CH2. CH2NH2)(n), [III, n = 4 (a), 12 (b), 28 (c)] and [(O1.5SiC H2CH2CH2NH2)(6)Co][Co(CO)(4)](2).(SiO2)(n) [IV, n =12 (a), 30 (b)] were pre pared by cohydrolysis of hexaaminocobalt(II) tetracarbonylcobaltate {[(EtO) (3)SiCH2CH2. CH2NH2](6)Co} [Co(CO)(4)](2) (I) With 3-aminopropyltriethoxysi lane or tetraethoxysilane. Complex I was prepared from dicobalt octacarbony l and 3-aminopropyltriethoxysilane. Hydrolyzed complex {[O-1.17(EtO)(0.67)S iCH2. CH2CH2NH2)(6)Co} [Co(CO)(4)](2) (II) and compounds IIIa-IIIc are, res pectively, brown and lilac nonporous glassy materials stable in air. Along with the main component, [(O1.5SiCH2CH2CH2NH2)(6)Co][Co(CO)(4)](2) compound s II-IV contain also {(O1.5SiCH2CH2CH2NH2)(n)[(O1.5SiCH2CH2CH2NHC(O)H](6-n) Co}[Co(CO)(4)](2) and (O1.5SiCH2CH2CH2NH3)[Co(CO)(4)]. Chalky powdery xerog els IVa and IVb have specific surface area of 12 and 28 m(2) g(-1), effecti ve porosity of 0.13 and 0.58, and specific effective pore volume of 0.09 an d 0.85 cm(3) g(-1), respectively. Thermolysis of II-IV at 150-500 degrees C yields H-2, CO, CO2, NH3, saturated and unsaturated hydrocarbons, and amin o alcohols. Heat treatment increases the specific surface area of both nonp orous (II, III) and porous (IV) materials without destruction of their part icles.