Dimanganese decacarbonyl preparation

The best method for preparation of pentacarbonylchloromanganese is the reaction of chlorine with dimanganese decacarbonyl in carbon tetrachloride solution. Earlier versions of this procedure2 often give low yields however, the present version is reliable and produces a good yield. 

Diketimininates, for cobalt(II) complexes, 7, 16 /3-Diketonates, liquid crystals, 12, 238 Diketones, asymmetric hydrogenation, 10, 48 a-Diketones, bis-silylation, 10, 746 l,l -Dilithioruthenocene, preparation, 6, 630 Dimanganese decacarbonyl complexes, characteristics, 5, 761... 

Dimanganese decacarbonyl, which is prepared by the reduction of manganese(II) halide in the presence of carbon monoxide under pressure [3], is a yellow crystalline, air-stable solid soluble in organic solvents, which sublimes readily in vacuo at ca 50 °C. A single-crystal X-ray diffraction study showed that Mn2(CO)io possesses the structure as shown below. 

Alternative methods are available for the preparation of [Mn(CO)5] . A convenient method is the reaction of dimanganese decacarbonyl with hydroxide ion 146)... 

Another inorganic particle that has been prepared via RESS is iron oxide (Fe203) (75). The preparation involved rapid expansion of a Fe(N03)3 solution in supercritical water. The expansion was at 500°C and 100 MPa through 50-to 200-p,m-diameter orifices into an evacuated chamber. The Fe203 particles thus obtained were small and exhibited exceptional reactivities. In addition to inorganic oxides, several neutral metal carbonyls (chromium hexacarbonyl, dimanganese decacarbonyl, and triiron dodecacarbonyl) were processed via RESS to form micrometer-sized particles (76). The solubility of these compounds allowed the use of supercritical CO2 in the RESS processing. 

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