title: Divalent ytterbium complexes with crown and heterocrown ethers.
abstract: Several unusual complexes of ytterbium(ii) stabilised by coordination to mixed O4X2-donor macrocyclic ligands (X = O, NH, S or Se) are described. Distorted 8-coordination is evident from the crystal structure of the neutral [YbI2([18]aneO4Se2)], forming the first reported example of Yb(ii)-selenoether coordination.
authors.affiliation: School of Chemistry, University of Southampton, Southampton SO17 1BJ, UK. wxl@soton.ac.uk.
authors.forename: Philip N
authors.initials: PN
authors.lastname: Bartlett
authors.forename: Martin J D
authors.initials: MJ
authors.lastname: Champion
authors.forename: Mark E
authors.initials: ME
authors.lastname: Light
authors.forename: William
authors.initials: W
authors.lastname: Levason
authors.forename: Gillian
authors.initials: G
authors.lastname: Reid
authors.forename: Peter W
authors.initials: PW
authors.lastname: Richardson