title: 1-arsa-3-germaallene Tip(t-Bu)Ge═C═AsMes*: the heaviest mixed group 14 and 15 heteroallenic compound.
abstract: The 1-arsa-3-germaallene Tip(t-Bu)Ge═C═AsMes* (1, Tip = 2,4,6-triisopropylphenyl, Mes* = 2,4,6-tri-tert-butylphenyl), a stable heavier group 14 and 15 congener of allenes, has been synthesized by debromofluorination of Tip(t-Bu)Ge(F)-C(Br)═AsMes*. It reacts with methanol and 2,3-dimethyl-1,3-butadiene by the Ge═C double bond. The allenic-type structure of 1, featuring cumulated Ge═C and C═As double bonds, has been evidenced by means of spectroscopic and single-crystal X-ray determination. The electronic properties involved in this new system were obtained from DFT calculations. The mechanism of the reaction between 1 and the dimethylbutadiene is also described to understand the observed regio- and chemoselectivity.
authors.affiliation: Université de Toulouse, UPS, LHFA, CNRS, UMR 5069, Toulouse, France.
authors.forename: Dumitru
authors.initials: D
authors.lastname: Ghereg
authors.forename: Nathalie
authors.initials: N
authors.lastname: Saffon
authors.forename: Jean
authors.initials: J
authors.lastname: Escudié
authors.forename: Karinne
authors.initials: K
authors.lastname: Miqueu
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Sotiropoulos
mesh_terms: D001151:Arsenic / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005857:Germanium / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D011789:Quantum Theory; D013237:Stereoisomerism
chemical_list: D009942:Organometallic Compounds; D005857:Germanium; D001151:Arsenic