Premium
Cationic Niobium‐Sandwich and Piano‐Stool Complexes
Author(s) -
Unkrig Wiebke,
Zhe Fu,
Tamim Razan,
Oesten Friederike,
Kratzert Daniel,
Krossing Ingo
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202003748
Subject(s) - homoleptic , niobium , chemistry , cationic polymerization , valence (chemistry) , crystallography , valence electron , infrared spectroscopy , spectroscopy , single crystal , nuclear magnetic resonance spectroscopy , electron , stereochemistry , polymer chemistry , organic chemistry , physics , quantum mechanics , metal
The syntheses of the homoleptic bis(arene) niobium cations [Nb(arene) 2 ] + (arene = C 6 H 3 Me 3 , C 6 H 5 Me) with 16 valence electrons and heteroleptic arene‐carbonyl cations [(CO)Nb(arene) 2 ] + (arene = C 6 H 3 Me 3 , C 6 H 5 Me) and [(arene)M(CO) 4 ] + (arene = C 6 H 3 Me 3 , C 6 H 6 ) obeying 18 valence electrons are described. Stabilization of these complexes was achieved by using the weakly coordinating anions [Al(OR F ) 4 ] − or [F{Al(OR F ) 3 } 2 ] − (R F = C(CF 3 ) 3 ). The limits of two synthesis routes starting from neutral Nb(arene) 2 (arene = C 6 H 3 Me 3 , C 6 H 5 Me) or [NEt 4 ][M(CO) 6 ] (M = Nb, Ta) were investigated. All compounds were analyzed by single crystal X‐ray determination, vibrational and NMR spectroscopy. DFT calculations were executed to support the experimental data.