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Structural and Electronic Properties of Iron(0) PNP Pincer Complexes
Author(s) -
Glatz Mathias,
Gorgas Nikolaus,
Stöger Berthold,
Pittenauer Ernst,
Ferreira Liliana,
Veiros Luis F.,
Calhorda Maria José,
Kirchner Karl
Publication year - 2021
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202100015
Subject(s) - carbon monoxide , trigonal bipyramidal molecular geometry , crystallography , chemistry , mössbauer spectroscopy , pincer movement , coordination geometry , square pyramidal molecular geometry , quadrupole splitting , molecule , crystal structure , catalysis , organic chemistry , hydrogen bond
In the present work we have prepared and fully characterized several Fe(0) complexes of the type [Fe(PNP)(CO) 2 ] treating Fe(II) complexes [Fe(PNP)(Cl) 2 ] with KC 8 in the presence of carbon monoxide. While complexes [Fe(PNP NMe ‐ i Pr)(CO) 2 ], [Fe(PNP NEt ‐ i Pr)(CO) 2 ] adopt a trigonal bipyramidal geometry, the bulkier and more electron rich [Fe(PNP NH ‐ t Bu)(CO) 2 ] is closer to a square pyramidal geometry. Mössbauer spectra showed isomer shifts very close to 0 and similar to those reported for Fe(I) systems. Quadrupole splitting values range between 2.2 and 2.7 mm s −1 both in experiments and DFT calculations, while those of Fe(I) complexes are much smaller (∼0.6 mm s −1 ).
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