869661-57-4Relevant academic research and scientific papers
Reversal of polarization in amidophosphines: Neutral- and anionic-κP coordination vs. anionic-κP,N coordination and the formation of nickelaazaphosphiranes
Schranz, Ingo,Lief, Graham R.,Carrow, Christopher J.,Haagenson, Dana C.,Grocholl, Luke,Stahl, Lothar,Staples, Richard J.,Boomishankar, Ramamoorthy,Steiner, Alexander
, p. 3307 - 3318 (2007/10/03)
Nickel(II) chloride reacts with the bis(tert-butylamino) diazadiphosphetidine {But(H)NP(μ-NBu1) 2PN(H)But} to form trans-[{But(H)NP(μ- NBut)2PN(H)But}2NiCl2]. In solution and the solid-state each heterocyclic ligand coordinates nickel through one phosphorus atom only. For comparison the solid-state structure of the known trans-[NiCl2(PEt3)2] was also determined and it was found that the two complexes have almost identical bond parameters about nickel. The nickel-amidophosphine complexes [{Bu tOP(μ-NBut)2PNBut}NiCl(PBu n3)], [(PBu3n)ClNi{Bu tNP(μ-NBut)2/PNBut}NiCl(PBu 3n)], and [{Me2Si(μ-NBut) 2PNBut}NiCl(PBu3n)] were synthesized and X-ray structurally characterized. In these mono- and di-nuclear nickel complexes the nickel ions are coordinated in pseudo square-planar fashions, by one trialkylphosphine ligand, one chloride ligand and one κP,N-coordinated amidophosphine moiety from tert-butylamido-substituted heterocycles. Attempts to create nickel complexes chelated in a κ2P fashion by the o-phenylenediamine-tethered mono- and di-anionic 1-{Me2Si(μ- NBut)2PN} 2-{Me2Si(μ-NBut) 2PNH}C6H4 and 1,2-{Me2Si(μ- NBut)2PN}C6H4, respectively, afforded instead [1,2-{Me2Si(μ-NBut) 2PN{Me2Si(n-NBut)2PN}C 6H4NiCl] and [1,2-{Me2Si(μ-NBu t)2PN}-{Me2Si(μ-NBut) 2PN}C6H4Ni{PEt3}], each complex having κP,N and κP coordinated amidophosphine ligands. The Royal Society of Chemistry 2005.
