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Ring strain does not destabilize FeIII (1) and CrIII complexes with η3-bound triazacyclohexane ligands. In the CrIII complex with isopropyl substituents on the nitrogen atoms, two chloro ligands were readily exchanged for CH2SiMe3 groups. Thus, the easily accessible triazacyclohexanes may serve as sterically less demanding alternatives for triazacyclononane ligands.
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Köhn et al. (1994) studied this question.
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