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Prototropism in (Pentamethylcyclopentadienyl)iridium Complexes with Pyrazole Ligands
Author(s) -
Carmona Daniel,
Oro Luis A.,
Lamata M. Pilar,
Elguero Josté,
del Carmen Apreda María,
FocesFoces Concepción,
Cano Félix H.
Publication year - 1986
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198611141
Subject(s) - pyrazole , iridium , intramolecular force , ring (chemistry) , chemistry , ligand (biochemistry) , stereochemistry , medicinal chemistry , organic chemistry , catalysis , receptor , biochemistry
The structural effect of methyl substituents in the pyrazole (pz) ligand of [(C 5 Me 5 )Ir(pz) 3 H] complexes is considerable. Whereas all three rings in 1 are equivalent and participate in intramolecular protropism, this is true for only two rings in 2 . This is revealed, for example, in the larger basicity of the third pyrazole ring in 2 .