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- W2001677574 abstract "The electronic absorption spectra of compounds containing metal-metal triple bonds of σ2π4 valence electronic configuration are presented and discussed. The lowest-energy transition of M2L6 compounds (M = Mo or W, L = CH2But or OBut) is expected to be the dipole-allowed π → π* (eu → eg) transition. This appears to be the case for M2(CH2But)6 and M2(OBut)6 compounds, in which the lowest energy absorption bands occur between 26,000 and 28,000 cm−1 (ε = 1.1 x 103-1.8 x 103 M−1 cm−1). For M2(NMe2)6 compounds, the lowest energy absorption is not the π → π* transition but is assigned instead to a LMCT transition originating from nitrogen lone-pair orbitals, N1p → π*, observed at 30,800 cm−1 (ε = 1.4 x 104-1.9 x 104 M−1 cm−1). The π → π* transition is not observed in these compounds, but is presumably masked by the more intense LMCT. These assignments are derived from Xα-SW calculations performed and described by other authors (Bursten et al., J. Am. Chem. Soc. 1980, 102, 4579)." @default.
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- W2001677574 date "1987-01-01" @default.
- W2001677574 modified "2023-09-25" @default.
- W2001677574 title "Electronic absorption spectra of M2L6 compounds containing metal-metal triple bonds of σ2π4 configuration" @default.
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- W2001677574 doi "https://doi.org/10.1016/s0277-5387(00)86880-1" @default.
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