Crystal structure of N-(2-{[2,6-bis-(2,2,2-tri-fluoro-acetamido)-phen-yl]disulfan-yl}-3-(2,2,2-tri-fluoro-acetamido)-phen-yl)-2,2,2-tri-fluoro-acetamide.

The title compound, C20H10F12N4O4S2, is an organic diaryl di-sulfide compound with tri-fluoro-acetamide substituents at the ortho-positions of each benzene ring. There are two mol-ecules (labeled A and B) in the asymmetric unit. The F atoms of three of the -CF3 groups exhibit rotational disorder over two positions each. The S-S bond distances are 2.0914 (7) and 2.0827 (6) Šfor mol-ecules A and B, respectively. The dihedral angle between the S-S-C and S-C-C planes is 103.05 (15)° for mol-ecule A and 104.09 (15)° for mol-ecule B. The three-dimensional supra-molecular architecture of the crystal is sustained by numerous N-H⋯O, N-H⋯S and C-H⋯O inter-actions.

Crystal structure of chlorido-{5,10,15,20-tetra-kis-[2-(2,2-di-methyl-propanamido)-phen-yl]porphyrinato-κ(4) N}iron(III).

The title compound, [Fe(C64H64N8O4)Cl], is a five-coordinate square-pyramidal porphyrin complex with a chloride ion in the axial position, being coordinated from the protected side of the porphyrin; the Fe(III) atom is displaced by 0.474 (5) Šfrom the 24-atom mean plane of the porphyrin core towards the chloride. The porphyrin moiety is a 'picket-fence' 5,10,15,20-tetra-kis-[2-(2,2-di-methyl-propanamido)-phen-yl]porph-yrinate (por) group. The Fe-Cl bond length is 2.221 (2) Šand the Fe-N(por) bond lengths are in the range 2.043 (5)-2.063 (5) Å. The supra-molecular architecture of the crystal is sustained by C-H⋯O inter-actions between the pyrrolic and phenyl H atoms of one mol-ecule and the carbonyl O atoms of the 2,2-di-methyl-propanamido groups of adjacent mol-ecules. The methyl groups of three of the four tert-butyl substituents exhibited rotational disorder over two positions. The investigated crystal was twinned by a twofold rotation about the (001) axis with a refined twin ratio of 0.4086 (16).

(1-Methyl-1H-imidazole-κN (3))(1-methyl-2-nitroso-benzene-κN)(5,10,15,20-tetra-phenyl-porphyrinato-κ(4) N)iron(II) di-chloro-methane monosolvate.

The solvated title compound, [Fe(C44H28N4)(C4H6N2)(C7H7NO)]·CH2Cl2, is a porphyrin complex containing an octahedrally coordinated Fe(II) atom with 1-methylimidazole [Fe-N = 2.0651 (17) Å] and o-nitro-sotoluene ligands at the axial positions. The o-nitro-sotoluene ligand is N-bound to iron(II) [Fe-N = 1.8406 (18)Å and Fe-N-O = 122.54 (14)°]. The axial N-Fe-N linkage is almost linear, with a bond angle of 177.15 (7)°. One phenyl group of the porphyrin ligand is disordered over two orientations in a 0.710 (3):0.290 (3) ratio. The di-chloro-methane solvent mol-ecule was severely disordered and its contribution to the scattering was removed with the SQUEEZE routine [van der Sluis & Spek (1990 ▶). Acta Cryst. A46, 194-201].

Stable ruthenium nitrosyl porphyrins with axial O-bonded ligands; preparation and redox behavior.

The six-coordinate compounds, (T(p-OMe)PP)Ru(NO)(OC6HF4) and (T(p-OMe)PP)Ru(NO)(OC(=O)CF3) have been prepared and characterized by IR and NMR spectroscopy, electrochemistry and IR spectroelectrochemistry, and by X-ray crystallography. These compounds undergo macrocycle-centered oxidations, and loss of axial ligands upon reduction.