First ferrocenylstibines and their molecular structures

Tris-(1,2-N,N-dimethylaminomethylferrocenyl)stibine and its heterotrimetallic complex

“…Selected bond lengths and angles for all compounds are listed in Table 2. The average Sb-C (ferrocenyl) bond length found in these ferrocenylstibines is 2.123 Å, which is slightly shorter than that found in the other known tertiary stibines containing Sb-C (aryl) bond, this observation was also reported earlier [17,18]. It is to be noted that tris(1,2-aminomethylferrocenyl)stibine representing the first example of a structurally characterized ferrocenyl pnictogen where three 1,2-disubstituted ferrocenyl rings are attached to the central antimony atom and phosphorus analogue of this stibine is still missing in the literature.…”

“…There are many reports on the silicon, aluminum, and tin substituted FcN derivatives [14][15][16]. Recently our group has reported the first ferrocenylstibines containing 2-dimethylaminomethyl-and 2-dimethylaminoethyl-side chains and Sb-N hypervalent interactions were observed in their molecular structure [17,18]. In view of the existence of a few reports in the literature on ferrocene bonded antimony and our interest in functionalized triarylstibines ligands, especially those comprising triple substitution in ortho-positions [7,[19][20][21] and considering the unique stereoelectronic properties of the ferrocene framework for the synthesis of new ferrocenylstibine dendrimers, here, we wish to report the synthesis and structural characterization of new tertiary chloro-bis(1,2-ferrocenyl)stibine (2), tris(1,2-ferrocenyl)stibine ligand (2) and heterotrimetallic platinum complex of stibine (2).…”

Formation of (vinyl-ferrocenyl)stibines involving β-elimination: Hypervalent Sb–N bonding

“…Our group has reported the first ferrocenylstibines containing a 2-dimethylaminomethyl and a 2-dimethylamino ethyl side chain. These stibines also present Sb-N hypervalent interactions [14].…”

First example of antimoniated Schiff bases: Hypervalent Sb←N(sp2) bonds

“…To the best of our knowledge, these two antimoniated Schiff bases are the first examples and these compounds also present the existence of three intramolecular interactions between antimony and sp 2 -nitrogen atoms, however interactions between the antimony and sp 3 -nitrogen atoms have been widely reported [7][8][9][10][11][12][13][14]. In compound 2 apart from Sb-N intramolecular interactions, the molecule show intramolecular Sb-O interactions giving eight-coordinated antimony which is uncommon.…”

“…Intramolecular interactions between antimony and sp 3 -nitrogen atoms have been widely reported [7][8][9][10][11][12][13][14], and 2(Me 2 NCH 2 )C 6 H 4 -and 8-(Me 2 N)C 10 H 6 -moieties have often been applied to stabilize organoantimony molecular complexes, cations, or compounds containing metal-metal bonds [7][8][9][10][11][12][13][14]. Very recently, X-ray crystal structure of 4,4-dimethyl-2-{2-[(1-naphthyl)(4-tolyl)stibano]phenyl}-1,3-oxazoline has been reported which present first example of intramolecular hypervalent Sb N(sp 2 ) interaction [15].…”