Transition Metal. II. Complexes of Dithiacyclophanes.
Abstract
This investigation is related to our recent report on the synthesis and characterization of cobalt (II), copper (II), and nickel (II) complexes of the new macrocyclic ligand, 7-oxa-2,12-dithia(13) (2,6)pyridinopphane (1). The coordination chemistry of a series of structurally related macrocylclic ligands (1-8) was investigated. Macrocycles studied include oxa-, dioxa-, and thia- dithiapyridinophanes (2a, 2b, and 3a, respectively), oxa-, dioxa-, trioxa- and polymethylene-dithiaparacyclophanes (4a and 5, 4b and b) and 2,10-dithia(3.3) (2,6)pyridinophane (9). The pyridinophanes (2a, 2b, 3a and 9) formed stable crystalline complexes when treated with methanol solutions of cobalt (II), copper (II), and nickel (II) salts. However, cobalt (II) and nickel (II) salts did not form crystalline complexes when combined with the paracylcophanes (4, 5, and 6). Electronic spectra, electrolytic conductivities and magnetic susceptibilities data, and elemental analyses were utilized in the characterization of these complexes. Solution and solid state effective magnetic moments were identical for each complex derived from the oxapyridinophane 1, indicating that the same species exists in both phases. Overall, physical data support monomeric structures of general formula M(II)LX2 (where M(II) = the transition metal (II) cation, L= macrocycle, and X = halogen or thiocyanate) for all complexes studies. Keywords: Mixed crown ethers; Coordination compounds.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 25, 1986
- Accession Number
- ADA169107
Entities
People
- Derald Chriss
- Earl Doomes
- Thornton Rhodes
Organizations
- Southern University