Structural diversity in bishydroxylamine complexes of gallium

Boesing P, Willner A, Pape T, Hepp A, Mitzel NW (2008)
DALTON TRANSACTIONS (19): 2549-2556.

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Reactions of bishydroxylamines of the type HON(R) CH2CH2N(R) OH (R = Me, tBu) with trimethyl- and triisopropylgallium gave bicyclic metalla cages of the formula R'2GaO(R) NCH2CH2N(R) OGaR'(2) [R' = Me, R = Me (3a), tBu (3b); R' = iPr, R = Me (4a), tBu (4b)] with six-membered Ga2O2N2-rings. While the complexes show the same core constitution in the solid state, NMR spectra reveal the steric influence of the isopropyl substituent of the compounds 4a/4b on its behaviour in solution. The reaction of the sterically more demanding substituted tri-tert-butylgallium with HON(Me) CH2CH2N(Me) OH yielded a heterodimeric complex O'-[HON(Me)CH2CH2NH(Me)O(tBu(2)Ga)]-cyclo-(tBu(2)Ga)-O,N'-[ON(Me)CH2CH2N (Me)O] (5) with two gallium atoms of different surrounding and two different bishydroxylamine ligands, one doubly deprotonated and one protonated, but at one end in its tautomeric aminoxide form. Further condensation of 5 was observed to give a tricyclic compound cyclo-[(tBuGa)ON(Me)CH2H2N(Me)O](2) (6) with a central Ga2O2N2 ring resulting from two Ga-N donor-acceptor bonds.
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Boesing P, Willner A, Pape T, Hepp A, Mitzel NW. Structural diversity in bishydroxylamine complexes of gallium. DALTON TRANSACTIONS. 2008;(19):2549-2556.
Boesing, P., Willner, A., Pape, T., Hepp, A., & Mitzel, N. W. (2008). Structural diversity in bishydroxylamine complexes of gallium. DALTON TRANSACTIONS(19), 2549-2556. doi:10.1039/b718268f
Boesing, P., Willner, A., Pape, T., Hepp, A., and Mitzel, N. W. (2008). Structural diversity in bishydroxylamine complexes of gallium. DALTON TRANSACTIONS, 2549-2556.
Boesing, P., et al., 2008. Structural diversity in bishydroxylamine complexes of gallium. DALTON TRANSACTIONS, (19), p 2549-2556.
P. Boesing, et al., “Structural diversity in bishydroxylamine complexes of gallium”, DALTON TRANSACTIONS, 2008, pp. 2549-2556.
Boesing, P., Willner, A., Pape, T., Hepp, A., Mitzel, N.W.: Structural diversity in bishydroxylamine complexes of gallium. DALTON TRANSACTIONS. 2549-2556 (2008).
Boesing, Patrick, Willner, Alexander, Pape, Tania, Hepp, Alexander, and Mitzel, Norbert W. “Structural diversity in bishydroxylamine complexes of gallium”. DALTON TRANSACTIONS 19 (2008): 2549-2556.
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Structural variations and molecular dynamics of rare-earth metal complexes with the N,N-bis(2-{pyrid-2-yl}ethyl)hydroxylaminato ligand.
Hellmann BJ, Venugopal A, Mix A, Neumann B, Stammler HG, Willner A, Pape T, Hepp A, Mitzel NW., Chemistry 15(43), 2009
PMID: 19774565

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