Jump to main content
Jump to site search

Issue 15, 2018
Previous Article Next Article

Structural diversity in pyridine and polypyridine adducts of ring slipped manganocene: correlating ligand steric bulk with quantified deviation from ideal hapticity

Author affiliations

Abstract

We have synthesized several new manganocene-adduct ([Cp2Mn(L)] = 1–L) complexes using pyridine and polypyridine ligands and report their molecular structures and characterization data. Consistent with other molecules in this class [(ηx-Cp)2MnLn] or [(ηx-Cp)2Mn(L–L)] (n = 1, 2; x = 1, 3, or 5), the manganese-cyclopentadienide interaction deviates from the classical ηx interactions (x = 3 or 5). Such deviations have been ascribed to steric factors and often called non-ideal hapticity. However, there is no quantification of this non-ideal hapticity and thus it is difficult to evaluate the extent of ring slippage or assign hapticity. Furthermore, the hypothesis that non-ideal hapticity in high-spin MnII complexes is induced by steric interactions has not been systematically evaluated. Therefore, we report herein a quantified scale for deviation from ideal hapticity between zero (ideal η5 interaction) and one (“η1” interaction). This quantified deviation from ideal hapticity has an empirical relationship with the ligand's steric properties, which strongly supports the premise that steric interactions cause the deviations in ionic M–Cp interactions.

Graphical abstract: Structural diversity in pyridine and polypyridine adducts of ring slipped manganocene: correlating ligand steric bulk with quantified deviation from ideal hapticity

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Feb 2018, accepted on 03 Mar 2018 and first published on 22 Mar 2018


Article type: Paper
DOI: 10.1039/C8DT00537K
Citation: Dalton Trans., 2018,47, 5171-5180
  •   Request permissions

    Structural diversity in pyridine and polypyridine adducts of ring slipped manganocene: correlating ligand steric bulk with quantified deviation from ideal hapticity

    A. F. Cannella, S. K. Dey, S. N. MacMillan and D. C. Lacy, Dalton Trans., 2018, 47, 5171
    DOI: 10.1039/C8DT00537K

Search articles by author

Spotlight

Advertisements