doi: 10.1021/ja0544509.
Heterolytic H2 activation mediated by low-coordinate L3Fe-(mu-N)-FeL3 complexes to generate Fe(mu-NH)(mu-H)Fe species
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- PMID: 16173733
- DOI: 10.1021/ja0544509
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Heterolytic H2 activation mediated by low-coordinate L3Fe-(mu-N)-FeL3 complexes to generate Fe(mu-NH)(mu-H)Fe species
J Am Chem Soc.
.
Abstract
The diiron mu-nitride complexes, {L3FeII(mu-N)FeIIL3}- and L3FeIII(mu-N)FeIIL3, heterolytically activate hydrogen (1 atm) at ambient temperature in solution (L3 = [PhB(CH2PPh2)3]-). These transformations lead to structurally unique {L3FeII(mu-NH)(mu-H)FeIIL3}- and L3FeIII(mu-NH)(mu-H)FeIIL3 products. X-ray data establish a marked reduction in the Fe-Fe distance upon H2 uptake, and spectroscopic data establish both FeIIFeII species to be diamagnetic, whereas the FeIIIFeII species, L3FeIII(mu-N)FeIIL3 and L3FeIII(mu-NH)(mu-H)FeIIL3, populate doublet ground states with thermally accessible higher spin states.
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