title: 6-Methoxy-5-phosphaphenanthrene: a molecule with an unreactive P=C double bond.
abstract: A multi-step synthesis of the title compound has been devised. In spite of its P=C double bond, the compound does not react at 100 °C with methanol and 2,3-dimethyl-1,3-butadiene. DFT calculations indicate a planar core, a long P=C double bond at 1.725 Å and a high-lying LUMO. Complexation can force the methoxy substituent to rotate out of the plane, thus restoring partly the double bond character of the P=C bond.
authors.affiliation: College of Chemistry and Molecular Engineering, International Phosphorus Laboratory, Zhengzhou University, Zhengzhou 450001, P.R. China. duanzheng@zzu.edu.cn.
authors.forename: Lili
authors.initials: L
authors.lastname: Wang
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Wang
authors.forename: Qiuyan
authors.initials: Q
authors.lastname: Wang
authors.forename: Zheng
authors.initials: Z
authors.lastname: Duan
authors.forename: François
authors.initials: F
authors.lastname: Mathey