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Title: A DFT study on the mechanism of the gas phase reaction of niobium with acetaldehyde
Authors: Wang, Yong
Chen, Gui-hua
Keywords: Theoretical chemistry;Density functional calculations;Potential energy surfaces;Niobium;Acetaldehyde
Issue Date: Nov-2012
Publisher: NISCAIR-CSIR, India
Abstract: The reaction between niobium atom and acetaldehyde has been investigated with a DFT approach. Both ground and excited state potential energy surfaces are investigated in detail. The present results show that the title reaction starts with the formation of a η2-CH3CHO-metal complex followed by C−C, aldehyde C−H, methyl C−H and C−O bond activation. These reactions can lead to several different products, viz., NbCO+CH4, NbCOCH2+H2, NbCOCH3+H, NbCHO CH2+H, NbH+CH3CO, NbO+CH3CH and NbO+C2H4. The spin-forbidden reaction, 6Nb+CH3CHO → 2IM9 is found to be energetically most favorable. According to the identified reaction mechanisms, the sextet–quartet and quartet–doublet surface crossings are suggested and the crossing region is approximately determined. The present results may be helpful in understanding the mechanism of the title reaction and in experimental investigations of the reaction.
Page(s): 1553-1560
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.51A(11) [November 2012]

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