Photochemical Characteristics of the mode-locking dyes 1,1′-diethyl-4,4′ carbocyanine iodide (cryptocayanine,DCI) and 1,1′-diethyl-2,2′ dicarb

The fluorescence quantum efficiencies, lifetimes and triplet—triplet absorption spectra of the cyanine dyes DCI     

Kristall- und Molekülstruktur von Bis(1,1-diethyl-3-thiobenzoyl-thioureato)nickel(II)

Crystal and Molecular Structure of Bis(1,1-diethyl-3-thiobenzoyl-thioureato)nickel(II). Bis(1, 1-diethyl-3-thiobenzoyl-thioureato)nickel(II) forms two modifications, whose structures have been determined by X-ray structure analysis. The monoclinic modification crystallizes in the space group P2₁/n with a = 13.709, b = 8.571, c = 12.803 Å, β = 68.10° and Z = 2. The triclinic modification crystallizes in the space group I1 with a = 14.406, b = 7.761, c = 11.734 Å, α = 86.10, β = 97.39, γ = 90.18° and Z = 2. The molecular structures of both modifications are nearly identical (packing polymorphism). The coordination is exactly planar, the ligands are arranged in trans position. The average Ni? S bond length is 2.153 Å in the monoclinic form and 2.163 Å in the triclinic form. The chelate rings deviate from planarity.     

Kristall- und Molekülstruktur von Tris(1,1-diethyl-3-benzoyl-thioureato)ruthenium(III)

Crystal and Molecular Structure of Tris(1,1-diethyl-3-benzoyl-thioureato)ruthenium(III) The crystal and molecular structure of tris(1,1-diethyl-3-benzoyl-thioureato)-ruthenium(III) has been determined by an X-ray structure analysis. The compound crystallizes in the trigonal space group P3 with a = 16.556, c = 8.476 Å and Z = 2. The structure was solved by Patterson methods and refined to a final R value R = 0.074 for 801 observed reflections. The molecule has the symmetry C₃. The coordination polyhedron is an octahedron with facial arrangement of the ligator atoms. The Ru? S and Ru? O distances are 2.293 Å and 2.047 Å, respectively.     

Kristall- und Molekülstruktur von Tris(1,1-diethyl-3-benzoylthioharnstoff)silber(I)-hydrogensulfid

Crystal and Molecular Structure of Tris(1,1-diethyl-3-benzoylthiourea)silver(I) Hydrogensulfide . The crystal structure of tris(1,1-diethyl-3-benzoylthiourea)silver(I) hydrogensulfide has been determined by X-ray crystal structure analysis. The substance crystallizes monoclinic, space group P2₁/n with a = 8.181, b = 20.216, c = 25.035 Å, β = 98.21° and 4 formula units per unit cell. The structure was solved by heavy atom technique and refined to a final R value of R = 0.046. Silver(I) does not form a chelate with the ligand 1,1-diethyl-3-benzoylthiourea. Three molecules of the ligand coordinate monodentately via the S atoms while a fourth coordination position is occupied by a hydrogensulfide ion. The coordination polyhedron is a distorted tetrahedron.     

Synthesis and Structure of 3-Methyl-2,2,4-trinitro-3-thiolene 1,1-dioxide

The structure of the first representative of the polynitrothiolene 1,1-dioxide series was studied. Complex analysis of quantum-chemical results, spectral characteristics, and powder X-ray diffraction patterns allowed this compound to be assigned the structure of 3-methyl-2,2,4-trinitro-3-thiolene 1,1-dioxide. The heteroring has an envelope conformation. The sulfur atom slightly deviates from the ring plane, the nitro group attached to the C_sp ² atom is involved in conjugation, and the nitro groups attached to the C_sp ³ atom are nonequivalent and perpencular to each other.     

Synthesis and crystal structure of Cu(I) and Ni(II) complexes of 1,1-diethyl-3-(4-fluorobenzoyl)-thiourea

The reaction of 1,1-diethyl-3-(4-fluorobenzoyl)-thiourea (HL) with CuCl₂ ·?2H₂O and NiCl₂ ·?6H₂O give two complexes, Cu(HL)₃Cl (1) and NiL₂ (2). The crystal structures of these products were determined by single crystal X-ray diffraction. In 1, three HL molecules are unidentate, coordinating through the sulfur, and the copper is tetrahedral with three S and one Cl. In 2, two HL molecules are O and S donor bidentate and coordinate as anionic species with loss of the proton from the acyl-substituted nitrogen; the nickel is square-planar.     

Crystal and Molecular Structure of 4-Nitro-2-oximino-3-phenylamino-3-thiolene-1,1-dioxide

The present publication reports the results of X-ray diffraction (XRD) analysis of 4-nitro-2-oximino-3-phenylamino-3-thiolene-1,1-dioxide crystals (I). The synthesis and the useful properties of this class of compounds are reviewed in [1]. It is noteworthy that previously [2] an X-ray structure analysis has been performed for another compound from this class, 3-methyl-4-nitro-2-oximino-3-thiolene-1,1-dioxide (II), which was assumed to exist in nitrone form. The XRD data for compound I disprove this assumption.     

Synthesis and Crystal Structure of N,N''''-Diphenyl-3, 6-diethyl-1,4-dihydro-s-tetrazine-1,4-dicarbonamide

1INTRODUCTIONIthasbeenarousedmoreandmoreinterestsinces-tetrazinewasfirstsynthesizedbyHautgschin1900[1].Thesynthesisofdihydroderivativeof3,6-dimethyl-s-tetrazinewasreportedindetailbySkorianetz[2].UsingX-ray,Jennison[3]foundthat1,6-dihydro-s-tetrazinehashom…