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RESEARCH PRODUCT
The Iron Hydrido Complex [FeH(dppe)2]+: Solution and Solid-State Reactivity with Dinitrogen
Peter BurgerGerhard PetersBeatrix E. WieslerFelix TuczekNicolai LehnertOliver Frankesubject
Inorganic Chemistrychemistry.chemical_compoundParamagnetismCrystallographychemistryMössbauer spectroscopyInfrared spectroscopyNuclear magnetic resonance spectroscopySinglet stateTriplet statePhotochemistryMagnetic susceptibilityTetrahydrofurandescription
The blue compound [FeH(dppe)2]BPh4 (1) (dppe = 1,2-bis(diphenylphosphino)ethane) is investigated by optical absorption, vibrational, NMR and Mossbauer spectroscopy as well as magnetic susceptibility measurements. In the solid state, 1 is found to be paramagnetic (S=1) whereas in tetrahydrofuran (thf) solution it is diamagnetic. Importantly, 1 reacts with dinitrogen in thf solution and in the solid state to give the yellow and green dinitrogen complexes 2a and 2b, respectively, both of which have the formula [FeH(N2)(dppe)2]BPh4. Apart from their colour and optical spectroscopic properties, the dinitrogen compounds 2a and 2b also differ in their magnetic, Mossbauer and vibrational properties. The N-N stretching frequency of 2a is found at 2120 cm−1 whereas 2b exhibits an N-N stretching vibration of 2145 cm−1. Moreover, 2a is diamagnetic whereas 2b is paramagnetic. DFT is employed to determine the relative energies and structure of 1 and its dinitrogen adducts in the singlet and triplet state.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-06-01 | Zeitschrift für anorganische und allgemeine Chemie |