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A Theoretical Aprroach on The Interactions between [M(R,R'timdt)2] Dithiolenes and Halogens
No full text31P CP-MAS NMR, Vibrational, and X-Ray Characterization of the Adducts of Triphenylphosphine Sulfide with ICl and IBr
No full textThe reactions between triphenylphosphine sulfide (Ph3PS) and ICl in CCl4 and IBr in CH2Cl2 in 1:1 molar ratio give the solid adducts Ph3PS · ICl (I) and Ph3PS · IBr (II) whose structures have been solved by X-ray diffraction. Compounds I and II consist of discrete molecule units and feature the S-I-Cl or S-I-Br linear group. The S-I bond distances in I, II (2.641(1), 2.665(1) Å respectively) and in compound 2 Ph3PS · 3I2 (III) (2.729(2) Å) are correlable to the net increase in the I-X (X = Cl, Br, I) bond distance. The structural features of I, II and III are in accordance with 31P CP-MAS NMR, FT-Raman and FT-IR spectral data, and elucidate the nature of the donor (Ph3PS)-acceptor (ICl, IBr, I2) interaction
Hydantoin derivatives as spacers for crystal engineering in the chemistry of heavy alkali metal ions: synthesis and crystal structure of layered (CsLOH)oo (L = 5,5-dimethyl-4-oxoimidazolidine-2-thione
No full textReaction of N.N\'-dimethylimidazolidine-2-selone (L) with I2. Crystal structure of the mixed-valence (L.I2)(L2)2+.2I3-
No full textCharge-transfer complexes of Benzoxazole-2(3H)-thione and Benzoxazole-2(3H)-selone with diiodine: X-ray crystal structure of Benzoxazole-2(3H)-thionebis(diiodine)
No full textSolids of stoichiometry 1 . I-2 (C7H5I2NOS; I), 1 . 2I(2) (C7H5I4NOS; II), 2 . I-2 (C7H5I2NOSe; III) and 2 . 2I(2) (C7H5I4NOSe; IV) have been obtained by reacting respectively benzoxazole-2(3H)-thione (1) and benzoxazole-2(3H)-selone (2) with molecular diiodine in a 1:1 or 1:2 molar ratio in CH2Cl2 solution. Crystals suitable for X-ray structure determination have been obtained only for II and contain units formed by one diiodine molecule bonded almost linearly [178.44(4)degrees] to the thionic sulphur atom of 1 and another diiodine molecule weakly interacting with the former. The FT-Raman spectrum in the characteristic nu(I-I) region shows two bands for compound II at 176 and 159 cm(-1), in accordance with the presence of two differently perturbed diiodine molecules [I(1)-I(2) = 2.769(1) Angstrom, I(3)-I(4) = 2.729(1)Angstrom]. The FT-IR and FT-Raman spectra of compounds I, III and IV are discussed in comparison with the spectrum of II and with those reported for similar charge transfer complexes
Variety of products from the reaction between selone donors and halogen/interhalogens acceptors: the case of N-methylthiazolidine-2(3H)-selone and N-methylbenzo-thiazole-2(3H)-selone
No full textAdducts of S/Se donors with dihalogens as a source of information for categorizing the halogen bonding.
No full textThe great variety of products ensuing from the reactions
between chalcogen donors and dihalogens and their assemblies in the crystal
lattice provides a wide experimental basis useful to disembroil the ongoing
debate on how to define the halogen bonding. In this paper we present a
critical analysis/study of the structural features retrieved from the Cambridge
Structural Database (CSD) for linear three-body systems involving either
halogens, X−X−X (X = Br, I), or halogen(s) and chalcogen(s) atoms, E−X−
Y, X−E−Y, and E−X−E (E = S, Se; X = Y = Cl, Br, I; X = I, Y = Cl, Br, I). The
relative elongations (δ) of the two bonds in the examined three-body systems
with respect to the sum of the relevant atomic radii can be fitted by a common
nonlinear least-squares equation derived from the bond-valence model. The
similarities observed in the structural features suggest a common nature of the
chemical bond in all systems considered and indicate that the charge transfer
and the 3c-4e models can be successfully applied to all the cases considered to
explain the nature of the chemical bonding
Hybrid metal-organic photodetectors based on a new class of metal-dithiolenes
No full textThe paper will describe a new photodetector based on a metal-organic semiconductor material sensitive to the near IR region of the lectromagnetic spectrum. The detector has a planar metal-semiconductor-metal structure with the active material deposited from liquid phase over a quartz substrate. Together with the fabrication process and the time response to light pulses, emphasis will be given to the intrinsic wavelength selectivity of the semiconductor material, of about 100nm around its peak sensitivity. The ease of deposition may enable to directly develop optical devices on passive optical component or on lectronic subsrates
Conductivity, FT-Raman Spectra, and X-ray Crystal Structures of Two Novel [D2I]In (n = 3 and D = N-Methylbenzothiazole-2(3H)-selone; n = 7 and D = N-Methylbenzothiazole-2(3H)-thione) Iodonium Salts. First example of I-.3I2 Heptaiodide
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