An electronically unsaturated trinickel complex containing triply bridging benzyne and 2,2'-biphenylyl groups

Dibenzometallacyclopentadienes, boroles and selected transition metal and main group heterocyclopentadienes: Synthesis, catalytic and optical properties

“…21) [31]. A compound structurally similar to 42 was synthesized by Johnson et al during their investigations on aromatic C-H bond activation mediated by nickel.…”

[(8a,9,9a-η)-9-(η5-Cyclopentadienyl)-9-nickelafluorenyl](η5-pentamethylcyclopentadienyl)nickel(II)

“…The structure of (I) may be compared with other compounds which contain a nickelafluorenyl ring. So far, only a few examples of such complexes have been reported, containing either one (Vicic & Jones, 1999;Schaub et al, 2006;Keen et al, 2007;Bennett et al, 2003;Schaub & Radius, 2005), two (Buchalski et al, 2006;Losi et al, 2007) or three (Schaub et al, 2006;Keen et al, 2007;Bennet et al, 1990) Ni atoms in the molecule (Fig. 3).…”

The activation and transformations of acenaphthylene by osmium carbonyl cluster complexes

“…These ligands typically coordinate through an h 6 -bonding mode to one metal atom or through m 3 Á/h 2 :h 2 :h 2 bridging coordination to a triangular group of three metal atoms [4]. Aryne ligands, such as benzyne containing an internal triple bond, are highly unstable, but can be isolated when they are coordinated to one or more transition metal atoms [5,6]. These ligands can be formed by cleavage of hydrogen atoms or substituents from substituted phenyl rings [7 Á/15].…”

“…These ligands can be formed by cleavage of hydrogen atoms or substituents from substituted phenyl rings [7 Á/15]. Arynes stabilized by osmium cluster compounds include Os 3 (CO) 9 (m 3 Á/h 2 -C 6 H 4 ) [8], Os 4 (CO) 12 (m 4 Á/h 2 :h 2 -C 6 H 4 Ã/C 6 H 5 ), and Os 2 (CO) 6 (m Á/h 4 -C 12 H 10 ) [9], (see Fig. 1).…”