Halogen complexes structure

X-ray Structures and Electronic Spectra of the Jt-Halogen Complexes between Halogen Donors and Acceptors with jr-Receptors... 

Roewer G, Herzog U, Trommer K, Muller E, Friihauf S (2002) Silicon Carbide - A Survey of Synthetic Approaches, Properties and Applications 101 59-136 Rosa A, Ricciardi G, Gritsenko O, Baerends EJ (2004) Excitation Energies of Metal Complexes with Time-dependent Density Functional Theory 112 49-116 Rosokha SV, Kochi JK (2007) X-ray Structures and Electronic Spectra of the n-Halogen Complexes between Halogen Donors and Acceptors with jc-Receptors. 126 137-160 Rudolf P, see Golden MS (2004) 109 201-229... 

In the gas phase, the dihalides have an angular structure, but in the solid state, most have complex structures held together by bridging halogen atoms. The gaseous EX4 molecules are tetrahedral, nonpolar, and more soluble in organic solvents than the EX2 compounds. 

The nitrosonium cation bears a formal relationship to the well-studied halogens (i.e. X2 = I2, Br2, and Cl2), with both classes of structurally simple diatomic electron acceptors forming an extensive series of intermolecular electron donor-acceptor (EDA) complexes that show well-defined charge-transfer absorption bands in the UV-visible spectral region. Mulliken (1952a,b 1964 Mulliken and Person, 1969) originally identified the three possible nonbonded structures of the halogen complexes as in Chart 7, and the subsequent X-ray studies established the axial form II to be extant in the crystals of the benzene complexes with Cl2 and Br2 (Hassel and Stromme, 1958, 1959). In these 1 1 molecular complexes, the closest approach of the... 

The complex is a brick red to brown, highly insoluble solid believed to have a polymeric, halogen-bridged structure.10 The principle reaction pathways of this complex involve chloride-bridge cleavage leading to a range of ruthenium(II) products.11... 

Both 1 1 and 2 1 complexes of Af,.ZV-diethyl- and N,iV-dimethyl-thiourea with zinc, cadmium and mercury halides have been prepared. The 2 1 complexes are either monomeric and tetrahedral or polymeric and halogen-bridged with octahedral metal coordination the 1 1 complexes also possess a polymeric, halogen-bridged structure, but with tetrahedral metal coordination.894 5... 

A rare ytterbium(III) complex [Yb(HB(pz)3)3] has an eight-coordinate bicapped trigonal prismatic structure (48) with two tridentate ligands and one bidentate ligand. The complex is stereochemi-cally rigid in solution. 1 A number of thorium and uranium complexes have been reported. These include [U(HB(pz)3)4], [U(H2B(pz)2)4], [U(HB(pz)3)2Cl2], and mono- and di-Cp metal-halogen complexes.49... 

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