... Please enable JavaScript to use all the features on this page. Polyhedron. Volume 52, 22 March 2013, Pages 755–760. ... 2.4. Structures and magnetic properties of [M(hfac) 2 (1) 2 ]. Isomorphous [M(hfac) 2 (1) 2 ] (M = Cu II and Mn II ) crystallized in the P 1 ¯ space group. ...