Synthesis of Trinuclear Tin(II), Germanium(II), and Aluminum(III)
Cyclophane Complexes
Version 2 2016-11-08, 14:03
Version 1 2016-10-21, 17:55
Posted on 2016-10-21 - 00:00
The
synthesis and characterization of trinuclear GeII and SnII chlorides and a trialuminum complex supported
by a trinucleating tris(β-diketiminate) cyclophane ligand (L3–) are reported. The in situ
deprotonation of H3L with benzylpotassium
and subsequent reaction with GeCl2·dioxane or SnCl2 afforded (GeCl)3L (1) and (SnCl)3L (2) in 42 and
60% yields, respectively. Each GeII and SnII atom is three-coordinate and exhibit pseudotrigonal pyramidal geometry
as anticipated for three-coordinate divalent group 14 cations. UV/visible
spectra collected on THF solutions of 1 and 2 display a bathochromic shift in the absorption from 1 to 2 (from 361 to 375 nm). Addition of AlMe3 to toluene solutions of H3L resulted in
the formation of (AlMe2)2AlMe3HL (3), which possesses two NCCCN chelated AlMe2 moieties. The third β-diketimine arm remains protonated
and adopts an atypical trans conformation with an
AlMe3 coordinated to the solvent exposed imine N atom.
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Ermert, David
M.; Gordon, Jesse B.; Abboud, Khalil A.; Murray, Leslie J. (2016). Synthesis of Trinuclear Tin(II), Germanium(II), and Aluminum(III)
Cyclophane Complexes. ACS Publications. Collection. https://doi.org/10.1021/acs.organomet.6b00354
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AUTHORS (4)
DE
David
M. Ermert
JG
Jesse B. Gordon
KA
Khalil A. Abboud
LM
Leslie J. Murray