Diverse reaction courses in the controlled carbometalation of heterocumulenes with zirconium-diene complexes and molecular structures of carbon dioxide, isocyanate and ketene 1:1 and 1:2 inserted compounds

Diene complexes of early transition metals: ideas and progresses at Osaka University

“…The selective formation of new metallacycles is realized upon addition of various a-olefines [87]. Tandem insertion reactions afforded 9-membered metallacycles [89,90]. These results were obtained in competition with ErkerÕs group, who reported essentially the same insertion reactions with the butadiene complex of zircononce [91][92][93][94].…”

“…Although some of the regioselective reactions of zirconocene diene complexes have been described fragmentally, prominent advantages in organic synthesis are briefly described here [86][87][88][89][90]. The most striking regio-selection was found in the addition reaction of carbonyl or olefinic bond to the isoprene complex, Cp 2 Zr(g 4 -isoprene) [86][87][88].…”

Nanoporous Materials as New Engineered Catalysts for the Synthesis of Green Fuels

“…The catalysts used in CO 2 methanation include the transition elements Ni [ 106 , 122 , 127 , 140 , 141 , 142 , 143 , 144 , 145 , 146 ], Pd [ 147 ], Pt [ 148 ], Co [ 149 , 150 , 151 ], Rh [ 66 , 152 , 153 , 154 ], Mg [ 155 ], Zn [ 156 ], Zr [ 157 , 158 ], Sn [ 159 ], U [ 160 ], Ta [ 161 ], Nb [ 162 ], Cr [ 163 ], Ir [ 164 , 165 ], Cu [ 166 ], Ag [ 166 ], V [ 167 ], W [ 163 , 168 , 169 , 170 ], Mo [ 171 , 172 , 173 ], Mn [ 174 , 175 ], Ti [ 176 , 177 ], Fe [ 72 , 178 , 179 , 180 , 181 ]. Excellent reviews of these reports have also been published.…”

Synthesis of titanium and zirconium complexes supported by a p-terphenoxide ligand and their reactions with N2, CO2 and CS2

“…3). 12 Thus, each central ring binds the metal in a Z 5 -cyclohexadienyl fashion. 11,13 This transformation represents a rare example of CO 2 insertion into metal-arene bonds.…”