Octacarbonyl-di-cobalt

Tri-iron dodecacarbonyl was prepared according to (l8) bis (cyclopentadienyldicarbonyliron) was prepared according to (19) tri-ruthenium dodecacarbonyl and di-cobalt octacarbonyl were supplied by Strem Chemicals. 

Decomposition of methanesulphonyl azide in aromatic solvents (methyl benzoate or benzotrifluoride), in the presence of transition metal compounds (e.g. copper(ri) acetylacetonate, manganese(ii) acetylacetonate, di-cobalt octacarbonyl, tri-iron dodecacarbonyl, and iron pentacarbonyl) led to a marked decrease in the aromatic substitution product compared with thermolysis, and, with the iron carbonyls, to an increased yield of methanesulphonamide . In addition, the aromatic substitution products shifted from mainly ortAo-substitution with no additives to mainly w ia-substitution in the presence of the additives mentioned above. 

Functional moieties for click reaction can either be incorporated in the polymer chain directly with the monomer, by quenching or via post-functionalization approaches. If the functional moiety is introduced with the monomer or the quencher, one has to consider the cross-reactivities between the metathesis catalyst and the functional moiety. In this case, the specific functional group can either be introduced by using protective groups, for example, complexing alkyne with Co2(CO)g, di-cobalt octacarbonyl or has to be introduced after the actual polymerization reaction. Post-functionalization approaches thereby often... 

Monomers with unprotected alkyne groups in the side chain cannot be polymerized without side reactions, as the alkylidene catalyst will engage in a competing alkyne metathesis. This side reaction can be avoided by using monomers with alkyne groups either complexed with di-cobalt octacarbonyl 1 or TMS-protected 2 (Scheme 9.3a,b) [14, 35, 36]. Alkyne incorporation at the chain end was achieved in a post-functionalization approach, reacting hydroxyl-terminated polynorbornene (PNBE) 5 with propargylic acid 6 (Scheme 9.3c) [37]. 

We report here results related to the catalytic behaviour of dodecacarbonyl-tri-iron and tri-ruthenium, bis(cyclopentadienyl-dicarbonyliron) and octacarbonyl-di-cobalt deposited on Y-zeolites under F-T conditions. The influence of the nature of the zeolite and of the metal, the dispersion of the metal and the reaction conditions upon activity and products distribution were investigated. 

CARBONYLHEXACARBONYLDI-, (CO-CO) COBALT OCTACARBONYL COBALT TETRACARBONYL COBALT TETRACARBONYL DIMER DI-MU-CARBON-YLHEXACARBONYLDICOBALT DICOBALT CARBONYL DICOBALT OCTACARBONYL OCTACARBONYLDICOBALT... 

Synonyms/Trade Names di-mu-CarbonylhexacarbonyIdicobalt, Cobalt octacarbonyl. Cobalt tetracarbonyl dimer. 

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