期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 16, 期 20, 页码 5882-5888出版社
WILEY-BLACKWELL
DOI: 10.1002/chem.201000567
关键词
bond energy; carbenes; density functional calculations; main group elements; periodic trends
资金
- Fonds der Chemischen Industrie
- Deutsche Forschungsgemeinschaft
- Cluster of Excellence: Unifying Concepts in Catalysis
- Alexander von Humboldt-Stiftung
DFT and CCSD(T) calculations have been performed to investigate the bonding situation of 54 cationic methylene complexes, MCH2+ (M = K-La, Hf-Rn). A comparison of the computed results with experimentally and CBS-QB3-derived data demonstrates the reliability of B3LYP/def2-QZVP with regard to the bond dissociation energies. Further, the bonding character of the MCH2+ complexes is revealed by geometrical and molecular-orbital (MO) analysis. The comparison of the periodic trends within the s-, p-, and d-block MCH2+ carbenes shows a pattern different for main-group versus transition-metal complexes. By combining this work with the recently reported trends for the f-block lanthanide carbenes MCH2+, a systematic and comprehensive overview can be obtained.
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