Three-coordinate metal amides of manganese(II) and cobalt(II): synthesis and x-ray structure of the first tris(silylamide) of manganese and the x-ray crystal structures of [M2(N(SiMe3)2)4] (M = Mn, Co)

The synthesis and characterization of a series of cobalt(II) β-ketoaminato complexes and their cytotoxic activity towards human tumor cell lines

“…Burger and Wannagat [22] reported the successful preparation of the cobalt amido compound, along with the trivalent iron derivative Fe[N(SiMe 3 ) 2 ] 3 . The cobalt amido compound's THFfree solid-state structure was determined to be a dimeric complex with bridging amido groups: [((Me 3 Si) 2 NCo) 2 (μ-N(SiMe 3 ) 2 ) 2 ] [30]. However, if the synthesis is conducted in THF, the resulting complex is monomeric with THF coordinated as a donor solvent [31].…”

Some highlights from the development and use of bulky monodentate ligands

“…Andersen and coworkers extended the range of known three coordinate silylamides to actinides such as U{N(SiMe 3 ) 2 } 3 [83]. The M(II) species M{N(SiMe 3 ) 2 } 2 (M = Mn, Fe or Co) were found to have weakly dimerized, amide bridged structures as crystals [84][85][86]. In solution and in the vapor phase [87], they are monomeric with two-coordinate metals and readily form complexes with a variety of Lewis base donors [88].…”

Eine elektrochemische und strukturelle Studie an den Eisensilylamiden Fe[N(SiMe3)2]2 und Fe[N(SiMe3)2]3 / An Electrochemical and Structural Study of the Iron Silylamides Fe[N(SiMe3)2]2 and Fe[N(SiMe3)2]3

“…Monomere Molkülstrukturen weisen neben dem erwähnten Zinkamid auch die Komplexe M[N(SiMe 3 ) 2 ] 3 der dreiwertigen Metalle ( M = Cr, Mn, Fe, Co) auf [5 -7]. Andererseits findet man Dimere in den Festkörperstrukturen von {M[N(SiMe 3 ) 2 ] 2 } 2 ( M = Mn [8], Fe [9], Co und Ni [10] 1 [16] 2(THF) 3(2,2 bipy) 4(2,2 bipy) (1) 2,9630(9), N(1)-Si (1) 1,7204(7), N(1)-Si (1)#1 1,7205(7), N(2)-Si (2) 1,7342(11), N(2)-Si(3) 1,7402 (11), N(2)-Na (1) 2,4453(13), Na(1)-O (1) 2,167(2), Na (1) [19]. …”