The reaction between La atoms and 1,3-butadiene is carried out in a laser-vaporization molecular beam source. Metal-hydrocarbon species with formulas La(CnHn) (n = 2, 4, and 6) and La(CmHm+2) (m = 4 and 6) are observed with time-of-flight mass spectrometry and characterized with mass-analyzed threshold ionization spectroscopy. A lanthanum-benzene complex [La(C6H6)] is formed by 1,3-butadiene addition to lanthanacyclopropene [La(C2H2)] followed by molecular hydrogen elimination. Lanthanacyclopropene is an intermediate generated by the primary reaction between La and 1,3-butadiene. Two other intermediates produced by the La + 1,3-butadiene reaction are La[η4-(1-buten-3-yne)] [La(C4H4)] and 1-lanthanacyclopent-3-ene [La(C4H6)]. The La(benzene) complex exhibits distinctive metal-ligand bonding from that of the three intermediates as shown by the adiabatic ionization energies and ground electron configurations.
|Number of pages||7|
|Journal||Journal of Physical Chemistry A|
|State||Published - Feb 16 2017|
Bibliographical noteFunding Information:
This work is supported by the National Science Foundation Division of Chemistry (Chemical Structure, Dynamics, and Mechanisms Grant CHE-1362102 to D.S.Y.), the Kentucky Science and Engineering Foundation (D.S.Y.), the Natural Science Foundation of Heilongjiang province of China (Grant B2016004 to Y.L.), the Fundamental Research Funds for the Central Universities of China (Grant HIT.NSRIF.2017033 to Y.L.), and the National Natural Science Foundation of China (Grant 21203041 to Y.L)
© 2017 American Chemical Society.
Copyright 2017 Elsevier B.V., All rights reserved.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry