title: Collapsed Cu(II)-hydroxamate metallacrowns.
abstract: Degradation of a strained, thermodynamically destabilized pentanuclear copper(II) 12-metallacrown-4 complex based on a picoline hydroxamic acid resulted in the formation of the tetranuclear compounds which are the first examples of solely hydroxamate-based Cu(II) metallacrown complexes with a collapse of the metallamacrocyclic cavity.
authors.affiliation: Department of Chemistry, National Taras Shevchenko University, Volodymyrska St. 64, 01601 Kiev, Ukraine.
authors.forename: Irina A
authors.initials: IA
authors.lastname: Golenya
authors.forename: Elzbieta
authors.initials: E
authors.lastname: Gumienna-Kontecka
authors.forename: Alexander N
authors.initials: AN
authors.lastname: Boyko
authors.forename: Matti
authors.initials: M
authors.lastname: Haukka
authors.forename: Igor O
authors.initials: IO
authors.lastname: Fritsky