Sigma and Pi Interactions of the Pyrrolic Ligand Sandwich-Like Lanthanide Phthalocyanines Determined from Magnetic Susceptibility and Ligand-Field Theory

Abstract

Magnetic susceptibility data for praseodymium, neodymium, gadolinium, holmium, and erbium phthalocyanines taken in the temperature ranges 80-300 K or 4.2-300 K are reported. The sigma and pi-interactions of the pyrrolic nitrogen ligand with the praseodymium, neodymium, holmium, and erbium f-orbitals were obtained from angular overlap model ligand-field calculations including the full ground-state manifold. The position of the pyrrolic nitrogen ligand in the metallic two-dimensional spectro-chemical series is reported. The results show that the pyrrolic nitrogen is a weak donor and a moderate donor ligand. The cross-term AOM parameter is necessary in order to get good fits. Keywords: Magnetic susceptibility, Praseodymium, Neodymium, Gadolinium, Holmium, Erbium phthalocyanines, Angular overlap model, Ligand-field calculations.

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Document Details

Document Type
Technical Report
Publication Date
Jun 25, 1990
Accession Number
ADA223609

Entities

People

  • Juan Padilla
  • William E. Hatfield

Organizations

  • University of North Carolina at Chapel Hill

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Classification
  • Energy Levels
  • Gadolinium
  • Ground State
  • Magnetic Phenomena
  • Magnetic Properties
  • Metals
  • Military Research
  • Neodymium
  • Nitrogen
  • North Carolina
  • Phthalocyanines
  • Physical Properties
  • Praseodymium
  • Security
  • Two Dimensional

Fields of Study

  • Chemistry
  • Engineering

Readers

  • Materials Science and Engineering.
  • Organic Chemistry
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Space