A Series of F-Element Chelators; Diaza Crown Ethers Functionalized with Catecholate Binding Substituents
Journal Article
·
· Journal of Organometallic Chemistry
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Here, we report on the preparation of azacrown ethers functionalized with catechol groups. The synthetic approach was (1st) novel in that it made use of the Mannich reaction and (2nd) valuable in that it provided an improved synthesis (in terms of practical deployment) of the known N,N'-bis(2,3-dihydroxybenzyl)-4,13-diaza-18-crown-6, H4ChaCha. Moreover, it demonstrated potential application of the synthetic method for accommodating a wide range of catecholate functionalities by using the synthetic strategy to prepare N,N'-bis(2,3-dihydroxy-5-tert-butylbenzyl)-4,13-diaza-18-crown-6 (H4tBu2ChaCha) for the first time. These H4ChaCha and H4tBu2ChaCha macrocycles offer exciting opportunity to expand redox chemistry for the f-elements. As “proof-of-principle,” we isolated the unusual tetrameric cluster [La2(tBuChaCha)2]2 from reactions between H4tBu2ChaCha and La[N(SiMe3)2]3. Characterization of [La2(tBuChaCha)2]2 by elemental analysis, single crystal X-ray diffraction, IR, and UV–vis–NIR spectroscopy suggested that the complex represented a rare example of an f-element semiquinone. It further demonstrated that the combination of La3+ and H4tBu2ChaCha provided access to one-electron oxidation chemistry within redox potential windows that were amenable to mild reaction conditions.
- Research Organization:
- Los Alamos National Laboratory (LANL)
- Sponsoring Organization:
- USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1412875
- Alternate ID(s):
- OSTI ID: 1548919
- Report Number(s):
- LA-UR-17-28162
- Journal Information:
- Journal of Organometallic Chemistry, Journal Name: Journal of Organometallic Chemistry Vol. 857; ISSN 0022-328X
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rapid column chromatographic method for the isolation of catechol-type siderophores
Lanthanide and yttrium complexes of deprotonated 4,13-diaza-18-crown-6 (DAC): Synthesis and structural characterization of Y[DAC][N(SiMe{sub 3}){sub 2}] and the novel trinuclear ytterbium(II) complex (Yb[N(SiMe{sub 3}){sub 2}][{mu}-DAC]){sub 2}Yb
Crystal Structure and Vibrational Spectra of N,N{sup '}-Di(2,4-Dinitrophenyl)diaza-18-Crown-6 and N,N{sup '}-Di(tetrafluoropyridyl)diaza-18-Crown-6
Journal Article
·
Fri Jun 01 00:00:00 EDT 1979
· Anal. Biochem.; (United States)
·
OSTI ID:5389874
Lanthanide and yttrium complexes of deprotonated 4,13-diaza-18-crown-6 (DAC): Synthesis and structural characterization of Y[DAC][N(SiMe{sub 3}){sub 2}] and the novel trinuclear ytterbium(II) complex (Yb[N(SiMe{sub 3}){sub 2}][{mu}-DAC]){sub 2}Yb
Journal Article
·
Tue Nov 08 23:00:00 EST 1994
· Inorganic Chemistry
·
OSTI ID:420996
Crystal Structure and Vibrational Spectra of N,N{sup '}-Di(2,4-Dinitrophenyl)diaza-18-Crown-6 and N,N{sup '}-Di(tetrafluoropyridyl)diaza-18-Crown-6
Journal Article
·
Sun Oct 31 23:00:00 EST 2004
· Crystallography Reports
·
OSTI ID:20666226