Entwicklung eines modularen Gestensteuerungssystems

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Dichlorido(5,10,15,20-tetra­phenyl­porphyrinato-κ4 N)anti­mony(V) hemi{di-μ-chlorido-bis­[trichloridoanti­monate(III)]} dichloro­methane monosolvate

The asymmetric unit of the title complex, [Sb(C44H28N4)Cl2][Sb2Cl8]0.5·CH2Cl2, is composed of a SbV complex cation wherein the Sb atom is hexa­coordinated by four N atoms of the pyrrole rings of the tetra­phenyl­porphyrinate (TPP) ligands and two chloride ions, a half di-μ-chlorido-bis­[trichloridoanti­monate(III)] counter-anion and a dichloro­methane solvent mol­ecule. In the cation, the average Sb—N distance is 2.066 (2) Å, while the Sb—Cl distances are 2.3410 (11) and 2.3639 (12) Å. The central unit of the cation, SbN4C20, is far from being planar, with deviations of atoms from the least-squares plane ranging from −0.110 (4) to 0.124 (4) Å. The Sb—Cl distances in the anion, which is located about an inversion center, lie in the wide range 2.3715 (13)–2.7489 (13) Å, the longest distances being between the Sb and bridging Cl atoms. The crystal structure is stabilized by inter­molecular C—H⋯Cl inter­actions involving the cations, the anions and the solvent mol­ecules. The solvent mol­ecule is disordered over two orientations in a 0.901 (13):0.099 (13) ratio

Nitration of Halterman porphyrin: a new route for fine tuning chiral iron and manganese porphyrins with application in epoxidation and hydroxylation reactions using hydrogen peroxide as oxidant

International audienceA methodology is reported for the regioselective nitration of the phenyl groups of Halterman porphyrin, using NaNO2. These nitro-porphyrins can be reduced to aminoporphyrins and then N-dimethylated to give new optically active porphyrins. Applications to the asymmetric epoxidation of styrene derivatives by H2O2 to give optically active epoxides (ee up to 60%) and hydroxylation of alkanes to give optically active secondary alcohols (ee up to 69%) were carried out in organic solvents (dichloromethane/methanol) using chiral iron and manganese porphyrins as catalysts

(Cryptand-222)potassium(+) (hydrogensulfido)[5,10,15,20-tetra­kis(2-pival­amido­phen­yl)porphyrinato]ferrate(II)

As part of a systematic investigation for a number of FeII porphyrin complexes used as biomimetic models for cytochrome P450, crystals of the title compound, [K(C18H36N2O6)][FeII(C64H64N8O4)(HS)], were prepared. The compound exhibits a non-planar conformation with major ruffling and saddling distortions. The average equatorial iron–pyrrole N atom [Fe—Np = 2.102 (2) Å] bond length and the distance between the FeII atom and the 24-atom core of the porphyrin ring (Fe—PC= 0.558 Å) are typical for high-spin iron(II) penta­coordinate porphyrinates. One of the tert-butyl groups in the structure is disordered over two sets with occupancies of 0.84 and 0.16

Development of a new bisphenol A electrochemical sensor based on a cadmium(ii) porphyrin modified carbon paste electrode

In this study, the (5,10,15,20-tetrakis[(4-methoxyphenyl)]porphyrinato)cadmium(II) complex ([Cd(TMPP)]) was successfully used as a modifier in a carbon paste electrode (CPE) and exploited for bisphenol A (BPA) detection. Analytical performance revealed two linear ranges from 0.0015–15 μM and 0.015–1.5 mM with a detection limit of 13.5 pM. The proposed method was implemented in water samples, which resulted in quantitative signals over the range 6.5–1000 μM with recoveries between 92.6 and 107.7% for tap water and between 96.6 to 106.0% for mineral water

Tri-μ-oxido-bis­[(5,10,15,20-tetra­phenyl­porphyrinato-κ4 N)niobium(V)]

In the title dinuclear NbV compound, [Nb2(C44H28N4)2O3], each Nb atom is seven-coordinated with three bridging O atoms and four N atoms from a chelating tetra­phenyl­porphyrinate anion. The Nb—O bond lengths range from 1.757 (6) to 2.331 (6) Å, and the average (niobium–pyrrole N atom) distance is 2.239 Å. In the dinuclear mol­ecule, the Nb⋯Nb separation is 2.8200 (8) Å, and the dihedral angle between the two porphyrinate mean planes is 5.4 (1)°. Weak inter­molecular C—H⋯π inter­actions are present in the crystal structure

Chlorido{5,10,15,20-tetra­kis­[2-(2,2-dimethyl­propanamido)­phen­yl]porphyrinato-κ4 N,N′,N′′,N′′′}iron(III) chloro­benzene hemisolvate monohydrate

In the title complex, [Fe(C64H64N8O4)Cl]·0.5C6H5Cl·H2O, the equatorial iron–pyrrole N atom distance (Fe—Np) is 2.065 (2) Å and the axial Fe—Cl distance is 2.207 (2) Å. The iron cation is displaced by 0.420 (4) Å from the 24-atom mean plane of the porphyrin core. The asymmetric unit contains a quarter of an [FeIII(C64H64N8O4)Cl] complex mol­ecule, with a fourfold rotation axis passing through the central metal cation and the Cl ligand, along with disordered mol­ecules of chloro­benzene and water of solvation; the solvent mol­ecules were excluded from the refinement

(5,10,15,20-Tetra­phenyl­porphyrinato-κ4 N)cobalt(II)–18-crown-6 (1/1)

The asymmetric unit of the title compound, [Co(C44H28N4)]·C12H24O6, contains one half of a CoII(TPP) (TPP is tetra­phenyl­porphyrin) complex and one half of an 18-crown-6 mol­ecule of crystallization, both lying on inversion centers. The CoII(TPP) complex exhibits a nearly planar conformation of the porphyrinate core [maximum deviation = 0.069 (2) Å] with an average Co—N distance of 1.971 (4) Å. The distance between the Co atom and the closest O atom of the 18-crown-6 mol­ecule is 2.533 (2) Å, indicating a short non-bonded contact between the Co atom and the crown ether mol­ecule. An ethyl­ene group of the 18-crown-6 mol­ecule is disordered over two sites with occupancies of 0.565 (7) and 0.435 (7)