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- W1987443132 abstract "1,3-Phenyl shifts interconvert imidoylketenes 1 and α-oxoketenimines 2 and, likewise, α-oxoketenes 3 automerize by this 1,3-shift. These rearrangements usually take place in the gas phase under conditions of flash vacuum thermolysis. Energy profiles calculated at the B3LYP/6-31G(d,p) and B3LYP/6311 + G(3df,2p)//B3LYP/6-31G(d,p) levels demonstrate that electron donating substituents (D) in the migrating phenyl group and electron withdrawing ones (W) in the non-migrating phenyl group, can stabilise the transition states TS1 and TS2 to the extent that activation barriers of ca. 100 kJ mol−1 or less are obtained; i.e. enough to make these reactions potentially observable in solution at ordinary temperatures. The calculated transition state energies ΔG(TS1) show an excellent correlation with the Hammett constants σp(W) and σp+(D)." @default.
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- W1987443132 date "2005-01-01" @default.
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- W1987443132 title "Imidoylketene-α-oxoketenimine and α-oxoketene–α-oxoketene rearrangements. 1,3-Shifts of substituted phenyl groups" @default.
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- W1987443132 doi "https://doi.org/10.1039/b504260g" @default.
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