title: Anion-pi interactions in four-membered rings.
abstract: In this study, the importance of anion-pi interactions in four-membered rings has been evidenced. Two kinds of rings have been found to be suitable for participation in anion-pi interactions: first, in different salts of cyclobuten-1,2-dione derivatives and, second, in eta(4)-cyclobutadiene complexes with transition metals.
authors.affiliation: Departament de Química, Universitat de les Illes Balears, Crta. de Valldemossa km 7.5, 07122 Palma, Spain.
authors.forename: Carolina
authors.initials: C
authors.lastname: Estarellas
authors.forename: M Carmen
authors.initials: MC
authors.lastname: Rotger
authors.forename: Magdalena
authors.initials: M
authors.lastname: Capó
authors.forename: David
authors.initials: D
authors.lastname: Quiñonero
authors.forename: Antonio
authors.initials: A
authors.lastname: Frontera
authors.forename: Antoni
authors.initials: A
authors.lastname: Costa
authors.forename: Pere M
authors.initials: PM
authors.lastname: Deyà