15224-49-4Relevant academic research and scientific papers
Reactivity of an All-Ferrous Iron-Nitrogen Heterocubane under Reductive and Oxidative Conditions
Lichtenberg, Crispin,Prokopchuk, Demyan E.,Adelhardt, Mario,Viciu, Liliana,Meyer, Karsten,Grützmacher, Hansj?rg
, p. 15797 - 15805 (2015)
The reactivity of the all-ferrous FeN heterocubane [Fe4(Ntrop)4] (1) with i)Bronsted acids, ii)σ-donors, iii)σ-donors/π-acceptors, and iv)one-electron oxidants has been investigated (trop = 5H-dibenzo[a,d]cyclo-hepten-5-yl). 1 showed self-re-assembling after reactions with i) and proved surprisingly inert in reactions with ii) and iii), with the exception of CO. Reductive and oxidative cluster degradation was observed in reactions with CO and TEMPO, respectively. These reactions yielded new cluster compounds, namely a trinuclear bis(μ3-imido) 48 electron complex in the former case and a tetranuclear all ferric μ-oxo-μ-imido species in the latter case. Characterization techniques include NMR and in situ IR spectroscopy, single crystal X-ray analysis, M?ssbauer spectroscopy, cyclic voltammetry, magnetic susceptibility measurements, and DFT calculations.
Synthesis and characterization of ion pairs between alkaline metal ions and anionic anti-aromatic and aromatic hydrocarbons with π-Conjugated central seven- And eight-membered rings
Bloch, Jan,Dey, Subal,Gianetti, Thomas L.,Grützmacher, Hansj?rg,Kradolfer, Stefan,Mougel, Victor,Ostendorf, Detlev
, (2020)
The synthesis, isolation and full characterization of ion pairs between alkaline metal ions (Li+, Na+, K+) and mono-anions and dianions obtained from 5H-dibenzo[a,d]cycloheptenyl (C15H11 = trop) is reported. According to Nuclear Magnetic Resonance (NMR) spectroscopy, single crystal X-ray analysis and Density Functional Theory (DFT) calculations, the trop- and trop2?? anions show anti-aromatic properties which are dependent on the counter cation M+ and solvent molecules serving as co-ligands. For comparison, the disodium and dipotassium salt of the dianion of dibenzo[a,e]cyclooctatetraene (C16H12 = dbcot) were prepared, which show classical aromatic character. A d8-Rh(I) complex of trop? was prepared and the structure shows a distortion of the C15H11 ligand into a conjugated 10π -benzo pentadienide unit—to which the Rh(I) center is coordinated—and an aromatic 6π electron benzo group which is non-coordinated. Electron transfer reactions between neutral and anionic trop and dbcot species show that the anti-aromatic compounds obtained from trop are significantly stronger reductants.
Photolysis of dibenzo[a,d]cycloheptene dimer
Chang, Meng-Yang,Huang, Yu-Ping
, p. 632 - 638 (2013/10/22)
Photolysis reaction of dibenzo[a,d]cycloheptene dimer 3 provides three dibenzo[a,d]cycloheptyl dimmers 4, 5 and 6 under different irradiation conditions via the intramolecular degradative cyclodimerization. A tetracyclic benzo[4,5]cyclohepta[1,2,3-de]naphthalene core is also synthesized.
