Transition Metal Complexes Containing an Optically Active Macrocyclic Ligand. Manganese(III), Nickel(II), and Copper(II)

Philip S. Bryan, James C. Dabrowiak

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Abstract

The synthetic macrocyclic ligand rac-5,7,7,12,12,14-hexamethy 1-1,4,8,11 -tetraazacyclotetradecane (rac-5,14-[14]aneN4) has been resolved via its nickel(ll) complex. The optically active ligand has been removed from Ni(II) and transferred to copper(II) and manganese(III). A circular dichroism analysis of (+)[Mn((–)5,14-[14]aneN4)X2]PF6, where X- is Cl- or Br-, has been very useful in interpreting the electronic spectrum of this tetragonally distorted high-spin d4 system. The macrocyclic crystal field (10Dq) for Mn(III) as measured by the position of the 5B1g5B2g electronic transition was found to be about 23 kK.

Original languageEnglish (US)
Pages (from-to)299-302
Number of pages4
JournalInorganic Chemistry
Volume14
Issue number2
DOIs
StatePublished - Feb 1 1975

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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