title: Synthesis and characterization of alkynyl complexes of groups 1 and 2.
abstract: The synthesis of N-heterocyclic carbene adducts of alkynyl lithium and magnesium is achieved, and different degrees of association are observed. Reaction of strontium amide nacnacSrN(SiMe(3))(2)(thf) (nacnac = CH(CMe2,6-iPr(2)C(6)H(3)N)(2)) with PhC[triple bond]CH in THF yields the dimeric alkynyl complex [nacnacSr(thf)(mu-C[triple bond]CPh)](2) which shows an interesting coordination geometry around the metal center. The compound retains the THF molecules, unlike its lighter congener, even in hydrocarbon solvents.
authors.affiliation: Institut für Anorganische Chemie der Georg-August-Universität, Tammannstr. 4, 37077 Göttingen, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Stasch
authors.forename: Sankaranarayana Pillai
authors.initials: SP
authors.lastname: Sarish
authors.forename: Herbert W
authors.initials: HW
authors.lastname: Roesky
authors.forename: Kathrin
authors.initials: K
authors.lastname: Meindl
authors.forename: Fabio
authors.initials: F
authors.lastname: Dall'Antonia
authors.forename: Thomas
authors.initials: T
authors.lastname: Schulz
authors.forename: Dietmar
authors.initials: D
authors.lastname: Stalke