Insertion of Isocyanide into Metal−Carbon Bonds of Alkylchloro(pentamethylcyclopentadienyl)niobium- and -tantalum Complexes − X-ray Structure of [TaCp*Cl2(CH2CMe2Ph){η2-C(CH2CMe2Ph)=N(2,6-Me2C6H3)}] and Unexpected Decomposition of Alkyldichloro(η2-iminoacyl) Complexes of Tantalum

Nondissociative Mechanism for the Inversion of the Configuration in Cyclopentadienyl Di(aryloxo)titanium Complexes: An Entropy Discussion

“…Several stereomutations described in the past few years with transition metal complexes are based on ligand dissociation , or ion pair species; − however, there are other stereomutations involving nondissociative mechanisms, for example, in the fluxional behavior observed in the stereomutation of pentacoordinate compounds derived of group 15, − group 14, , group 10, or group 5 elements. These isomerization processes usually follow two mechanisms, the Berry pseudorotation, in which the two axial substituents in a trigonal bipyramidal geometry interchange their position with two equatorial substituents, and the turnstile rotation, , usually observed in pentavalent compounds with tridentate ligands, in which the polydentate ligand rotates in one direction and the other two ligands in the opposite direction (Figure ).…”

Nondissociative Mechanism for the Inversion of the Configuration in Cyclopentadienyl Di(aryloxo)titanium Complexes: An Entropy Discussion

“…Several stereomutations described in the past few years with transition metal complexes are based on ligand dissociation , or ion pair species; − however, there are other stereomutations involving nondissociative mechanisms, for example, in the fluxional behavior observed in the stereomutation of pentacoordinate compounds derived of group 15, − group 14, , group 10, or group 5 elements. These isomerization processes usually follow two mechanisms, the Berry pseudorotation, in which the two axial substituents in a trigonal bipyramidal geometry interchange their position with two equatorial substituents, and the turnstile rotation, , usually observed in pentavalent compounds with tridentate ligands, in which the polydentate ligand rotates in one direction and the other two ligands in the opposite direction (Figure ).…”

Nondissociative Mechanism for the Inversion of the Configuration in Cyclopentadienyl Di(aryloxo)titanium Complexes: An Entropy Discussion

“…Several stereomutations described in the past few years with transition metal complexes are based on ligand dissociation , or ion pair species; − however, there are other stereomutations involving nondissociative mechanisms, for example, in the fluxional behavior observed in the stereomutation of pentacoordinate compounds derived of group 15, − group 14, , group 10, or group 5 elements. These isomerization processes usually follow two mechanisms, the Berry pseudorotation, in which the two axial substituents in a trigonal bipyramidal geometry interchange their position with two equatorial substituents, and the turnstile rotation, , usually observed in pentavalent compounds with tridentate ligands, in which the polydentate ligand rotates in one direction and the other two ligands in the opposite direction (Figure ).…”

Nondissociative Mechanism for the Inversion of the Configuration in Cyclopentadienyl Di(aryloxo)titanium Complexes: An Entropy Discussion

“…Several stereomutations described in the past few years with transition metal complexes are based on ligand dissociation , or ion pair species; − however, there are other stereomutations involving nondissociative mechanisms, for example, in the fluxional behavior observed in the stereomutation of pentacoordinate compounds derived of group 15, − group 14, , group 10, or group 5 elements. These isomerization processes usually follow two mechanisms, the Berry pseudorotation, in which the two axial substituents in a trigonal bipyramidal geometry interchange their position with two equatorial substituents, and the turnstile rotation, , usually observed in pentavalent compounds with tridentate ligands, in which the polydentate ligand rotates in one direction and the other two ligands in the opposite direction (Figure ).…”