871313-85-8Relevant academic research and scientific papers
Ion pairing in Ti(IV) trisamidotriazacyclononane compounds
Martins, Ana M.,Ascenso, Jose R.,Costa, Silvia M. B.,Dias, Alberto R.,Ferreira, Humberto,Ferreira, Jose A. B.
, p. 9017 - 9022 (2005)
[Ti{N(Ph)SiMe2}3-tacn]X complexes (X = Cl, 1; I, 2; PF6, 3; BPh4, 4) were studied by NMR and electron absorption and emission methods, which showed that these compounds exist in bromobenzene and dichloromethane solutions as ion pairs. The significant modifications observed in the proton resonances of tacn in C6D 5Br, which follow the sequence BPh4- ≥ PF6- ≥ I- ≈ Cl-, are a qualitative indication of the strength of the interactions that depend on the anion. The reaction of 2 with LiNMe2 led to [Ti(NPh){NPh(SiMe 2)}2-tacn], 5, that forms upon attack of Me 2N- at one SiMe2 group. The formation of 5 is discussed on the basis of the interactions identified in solution.
