Syntheses and solid-state structures of two cofacial (bis)dipyrrin dichromium complexes in different charge states
2021 ◽
Vol 77
(3)
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pp. 161-166
Keyword(s):
The dichromium Pacman complex ( tBudmx)Cr2Cl2·C4H10O (1) [( tBudmx)H2 is a dimethylxanthene-bridged cofacial (bis)dipyrrin, C49H58N4O] was synthesized by salt metathesis using anhydrous CrCl2 and previously reported ( tBudmx)K2. Treatment of 1 with two equivalents of the reductant potassium graphite afforded K2( tBudmx)Cr2Cl2(thf)3·0.5C4H10O·0.5C4H8O (thf is tetrahydrofuran, C4H8O) (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.
2015 ◽
Vol 127
(8)
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pp. 1397-1404
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2001 ◽
Vol 55
(10-11)
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pp. 9
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Keyword(s):
Keyword(s):
2017 ◽
Vol 139
(46)
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pp. 16696-16707
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Keyword(s):
1971 ◽
Vol 31
(2)
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pp. C43-C45
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1984 ◽
Vol 40
(11)
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pp. 1901-1905