Details

Autor(en) / Beteiligte

• Alberding, Brian G
• Chisholm, Malcolm H
• Lear, Benjamin J
• Naseri, Vesal
• Reed, Carly R

Titel

Synthesis and characterization of trans-M2(TiPB)2(O2C-CHCH-2-C4H3S)2 (M = Mo or W) and comments on the metal-to-ligand charge transfer bands in MM quadruply bonded complexes of the type trans-M2(TiPB)2L2, where TiPB = 2,4,6-triisopropylbenzoate and L = π-accepting carboxylate ligand

Ist Teil von

• Dalton transactions : an international journal of inorganic chemistry, 2011-01, Vol.40 (40), p.10658-10663

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The preparation and characterization of the compounds trans-M2(TiPB)2(O2C-CH==CH-2-C4H3S)2 where M = Mo or W and TiPB = 2,4,6-triisopropylbenzoate are reported. The optical spectra of the new compounds are compared with those of related trans-M2(TiPB)2L2 compounds where L = O2C-C6H4-4-CN, O2C- alpha , alpha ' -terthienyl (TTh), and O2C-4-C6H4N-B(C6F5)3, that show strong metal-to-ligand charge transfer bands because of M2 delta to L pi conjugation, and are notably temperature dependant due to the various conformations of the two trans-L groups. Upon cooling the spectral features sharpen as the planar geometry that optimizes M2 delta -L pi conjugation is favored. As the electronic coupling of the two trans-L pi systems increases the (0,0) electronic transition gains intensity indicating a greater nesting of the ground state (S0) and excited state (S1) potential energy surfaces. These features are discussed in terms of the related electronic coupling of [M2]-[M2] complexes.