An iron(II) hydride complex of a ligand with two adjacent beta-diketiminate binding sites and its reactivity

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Gehring H, Metzinger R, Braun B, Herwig C, Harder S, Ray K, Limberg C
Zeitschrift: Dalton Transactions
Verlag: Royal Society of Chemistry
Jahr der Veröffentlichung: 2016
Band: 45
Heftnummer: 7
Seitenbereich: 2989-2996
ISSN: 1477-9226
eISSN: 1477-9234


Abstract


After lithiation of PYR-H-2 (PYR = [(NC(Me)C(H)C(Me)NC6H3(iPr)(2))(2)(C5H3N)](2)(-)) - the precursor of an expanded beta-diketiminato ligand system with two binding pockets -with KN(TMS)(2) the reaction of the resulting potassium salt with FeBr2 led to a dinuclear iron(II) bromide complex [(PYR)Fe(mu-Br)(2)Fe] (1). Through treatment with KHBEt3 the bromide ligands could be replaced by hydrides to yield [PYR) Fe-2(mu-H)(2)] (2), a distorted analogue of known beta-diketiminato iron hydride complexes, as evidenced by NMR, Mossbauer and X-ray absorption spectroscopy, as well as by its reactivity: for instance, 2 reacts with the proton source lutidinium triflate via protonation of the hydride ligands to form an iron(II) product [(PYR)Fe-2(OTf)(2)] (4), while CO2 inserts into the Fe-H bonds generating the formate complex [(PYR) Fe-2(mu-HCOO)(2)] (5); in the presence of traces of water partial hydrolysis occurs so that [(PYR) Fe-2(mu-OH)(mu-HCOO)] (6) is isolated. Altogether, the iron(II) chemistry supported by the PYR2-ligand is distinctly different from the one of nickel(II), where both, the arrangement of the two binding pockets and the additional pyridyl donor led to diverging features as compared with the corresponding system based on the parent beta-diketiminato ligand.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Harder, Sjoerd Prof. Dr.
Lehrstuhl für Anorganische und Metallorganische Chemie


Einrichtungen weiterer Autorinnen und Autoren

Humboldt-Universität zu Berlin


Zitierweisen

APA:
Gehring, H., Metzinger, R., Braun, B., Herwig, C., Harder, S., Ray, K., & Limberg, C. (2016). An iron(II) hydride complex of a ligand with two adjacent beta-diketiminate binding sites and its reactivity. Dalton Transactions, 45(7), 2989-2996. https://dx.doi.org/10.1039/c5dt04266f

MLA:
Gehring, Henrike, et al. "An iron(II) hydride complex of a ligand with two adjacent beta-diketiminate binding sites and its reactivity." Dalton Transactions 45.7 (2016): 2989-2996.

BibTeX: 

Zuletzt aktualisiert 2019-06-08 um 09:18