Co-ordination bond properties in phthalocyaninatometal(II) complexes. Part 1. Stereochemistry and bond properties in bis(4-methylpyridine)-phthalocyaninatometal(II)–4-methylpyridine (1/2)(metal = cobalt or iron)

Structural characterization of two modifications of bis(4-methylpyridine)phthalocyaninato(2-)iron(II) complex

“…Therefore the crystals were inspected again after ca one year. The X-ray diffraction data confirmed their single crystalline form, but now the lattice parameters differ from that of FePc(4-Mepy) 2 Á 2(4-Mepy) (I) [10]. …”

“…Preliminary search by the X-ray diffraction of the fresh single crystals filtered from the mother liquor after one to several days prolonged thermal processing at 160 C or 120 C or even at 80 C show invariably the same crystalline lattice, consistent with that of FePc(4-Mepy) 2 Á 2(4-Mepy) (I) [10]. Although, crystals of I at laboratory air at room temperature showed no visible change with prolonged storage small, but noticeable mass decay was observed.…”

“…With pyridine, FePc transforms into * well developed and stable crystals of FePc(py) 2 [8]. However, as reported by Cariati et al [9,10], if FePc is thermally processed in 4-methylpyridine (4-Mepy) the formed FePc(4-Mepy) 2 complex co-crystallizes with solvent molecules forming well-developed crystals of FePc(4-Mepy) 2 Á 2(4-Mepy) (I) containing two solvating 4-Mepy molecules in addition to the axially bonded 4-Mepy's. The latter crystals are far more susceptible to decomposition.…”

Aminopyridine coordinated iron phthalocyanines: Synthesis, structure, and characterization

“…Such different packing patterns observed in our study and in the other axially coordinated iron phthalocyanines reported [1][2][3][4] show that the packing pattern of Pc is driven by the structure of axial ligands. The UV/vis spectra of the two complexes in DMF solution both showed typical Pc's Q band, and have approximately the same wavelength of maximal absorption (k max ) of 657 nm for 4-ampyFePc and 658 nm for 3-ampyFePc, respectively.…”

“…The intermolecular p-p intereactions are investigated from the crystal structures and related to the k max of UV/vis diffuse reflectance spectra (UV/vis DRS).Ó 2009 Elsevier B.V. All rights reserved.Axially coordinated iron phthalocyanines have attracted research interest with regard to the influence of axial ligand on the properties of the compounds [1][2][3][4]. This communication reports the crystal structures and UV/vis DRS of two aminopyridine coordinated phthalocyaninatoiron complexes, 3-ampyFePc and 4-ampyFePc (where 3-ampy and 4-ampy denote 3-aminopyridine and 4-aminopyridine ligands, respectively, and FePc denotes iron phthalocyanine).…”