Related Experiment Video
Updated: Apr 1, 2026

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
Published on: November 9, 2019
MM Quadruply Bonded Complexes Supported by Vinylbenzoate Ligands: Synthesis, Characterization, Photophysical
Samantha E Brown-Xu1, Malcolm H Chisholm1, Christopher B Durr1
1The Ohio State University, Department of Chemistry and Biochemistry, 100 W. 18 Avenue, Columbus, Ohio, 43202, USA.
Abstract:
From the reactions between M2(T PB)4 compounds and meta and para - vinylbenzoic acids (2 equiv) in toluene at room temperature the compounds trans-M2(T PB)2L2, where L = m-vinylbenzoate 1A (M = Mo) and 1B (M = W) and T PB = 2,4,6-triisopropylbenzoate, and where L = p-vinylbenzoate 2A (M = Mo) and 2B (M = W) have been isolated. Compounds 1A and 2A have been shown to undergo Heck carbon-carbon coupling reactions with phenyliodide to produce trans-Mo2(T PB)2(O2CC6H4-m-CH=CH-C6H5)2,3A and trans-Mo2(T PB)2(O2CC6H4-p-CH=CH-C6H5)2, 4A. The molybdenum compounds 1A and 2A have been structurally characterized by single crystal X-ray crystallography. All the new compounds have been characterized by 1H NMR, IR, UV-Visible absorption and emission spectroscopy, high resolution MALDITOF MS, fs- and ns- transient absorption spectroscopy and fs- time-resolved IR spectroscopy. Electronic structure calculations employing density functional theory, DFT, and time-dependent DFT have been employed to aid in the interpretation of spectral data. All compounds show intense absorptions in the visible region corresponding to M2δ to Lπ* charge transfer transitions. The lifetimes of the 1MLCT state fall in the range of 1 - 10 ps and for the molybdenum complexes the T1 states are 3δδ* with lifetimes ~50 μs while for the tungsten complexes the T1 are 3 MLCT with lifetimes in the range of 3 - 10 ns.
More Related Videos
19:58Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
07:50Efficient Synthesis of All-Carbon Quaternary Centers via the Conjugate Addition of Functionalized Monoorganozinc Bromides
Published on: May 26, 2019
Related Concept Videos
Valence Bond Theory
π Molecular Orbitals of 1,3-Butadiene
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
Nucleophilic Aromatic Substitution: Elimination–Addition
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3
Complexometric Titration: Ligands