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Syntheses and solid‐state structures of two cofacial (bis)dipyrrin dichromium complexes in different charge states
Author(s) -
Carsch Kurtis,
Elder Shelby E.,
Dogutan Dilek K.,
Nocera Daniel G.,
Yang Junyu,
Zheng Shao-Liang,
Daniel Timothy,
Betley Theodore A.
Publication year - 2021
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229621001388
Subject(s) - chemistry , anhydrous , potassium , ligand (biochemistry) , tetrahydrofuran , solid state , crystallography , ion , stereochemistry , medicinal chemistry , solvent , organic chemistry , biochemistry , receptor
The dichromium Pacman complex ( t Bu dmx)Cr 2 Cl 2 ·C 4 H 10 O ( 1 ) [( t Bu dmx)H 2 is a dimethylxanthene‐bridged cofacial (bis)dipyrrin, C 49 H 58 N 4 O] was synthesized by salt metathesis using anhydrous CrCl 2 and previously reported ( t Bu dmx)K 2 . Treatment of 1 with two equivalents of the reductant potassium graphite afforded K 2 ( t Bu dmx)Cr 2 Cl 2 (thf) 3 ·0.5C 4 H 10 O·0.5C 4 H 8 O (thf is tetrahydrofuran, C 4 H 8 O) ( 2 ), with both potassium ions intercalated between the pyrrolic subunits. Comparison of the solid‐state structures for 1 and 2 reveals minimal changes in the primary coordination sphere of each Cr ion, with notable elongation of the dipyrrin C—C and C—N bonds upon reduction, consistent with computational support for a ligand‐based reduction.