title: Convenient syntheses and structural characterizations of mono-substituted alkylimido hexamolybdates: [Mo6O18(NR)]2- (R = Me, Et, n-Pr, i-Pr, n-Bu, t-Bu, Cy, Hex, Ode).
abstract: Monofunctionalized alkylimido derivatives of hexamolybdate, (Bu(4)N)(2)[Mo(6)O(18)( identical withN-R)] (R = methyl, Me; ethyl, Et; n-propyl, n-Pr; i-propyl, i-Pr; n-butyl, n-Bu; t-butyl, t-Bu; cyclohexyl, Cy; n-hexyl, Hex; and n-octadecyl, Ode), have been prepared in high purity and good yield by the reaction of [Bu(4)N](4)[alpha-Mo(8)O(26)] with appropriate aliphatic amine hydrochlorides in anhydrous acetonitrile, using N,N'-dicyclohexylcarbodiimide (DCC) as the dehydrating agent. Eight compounds have been determined by single crystal X-ray diffraction analysis and all compounds have been studied with (1)H-NMR, IR, UV-vis, ESI mass spectrometry and cyclic voltammetry. A structural and (1)H-NMR study show beta hydrogen atoms of those alkylimido derivatives of hexamolybdate have strong Brønsted acidity compared to the hydrogen atoms in other positions.
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing 100084, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li
authors.forename: Longsheng
authors.initials: L
authors.lastname: Wang
authors.forename: Panchao
authors.initials: P
authors.lastname: Yin
authors.forename: Yongge
authors.initials: Y
authors.lastname: Wei
authors.forename: Jian
authors.initials: J
authors.lastname: Hao
authors.forename: Yulin
authors.initials: Y
authors.lastname: Zhu
authors.forename: Li
authors.initials: L
authors.lastname: Zhu
authors.forename: Gu
authors.initials: G
authors.lastname: Yuan