title: Axially chiral racemic half-sandwich nickel(ii) complexes by ring-closing metathesis.
abstract: A remarkable nickelacycle has been synthesised via olefin metathesis of the α,ω-diene complex [Ni(η5-C5H4R)(Br)(NHC)] (R = C(CH3)2CH2CH[double bond, length as m-dash]CH2, NHC = 1-(6-hexenyl)-3-(2,4,6-trimethylphenyl)-imidazol-2-ylidene). Single-crystal X-ray analysis reveals a helical shape of the molecule and stretching of some interatomic distances in the Ni(ii) coordination sphere. The Cp-NHC tethered complex shows catalytic activity resembling that of the parent complexes.
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland. wbuch@ch.pw.edu.pl.
authors.forename: Włodzimierz
authors.identifier: http://orcid.org/0000-0002-1832-7461
authors.initials: W
authors.lastname: Buchowicz
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland. wbuch@ch.pw.edu.pl.
authors.forename: Łukasz
authors.initials: Ł
authors.lastname: Banach
authors.affiliation: Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland.
authors.forename: Radosław
authors.identifier: http://orcid.org/0000-0002-8450-0955
authors.initials: R
authors.lastname: Kamiński
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland. wbuch@ch.pw.edu.pl.
authors.forename: Piotr
authors.initials: P
authors.lastname: Buchalski