Deuteron Spin Structure Functions at Small Bjorken-x

We investigate polarized deuteron structure functions at small values of the Bjorken variable, x < 0.1. In this region contributions from the coherent interaction of diffractively excited hadronic states with both nucleons become important. A proper treatment of this process requires an extension of the Glauber-Gribov multiple scattering theory to include spin degrees of freedom. In the kinematic domain of current fixed target experiments we observe that shadowing effects in g_1d are approximately twice as large as for the unpolarized structure function F_2d. Furthermore at x < 0.1 the tensor structure function b_1 is found to receive significant contributions from coherent double scattering.Comment: 30 pages, Revtex, include discussion on t-dependence of diffractive production processes, to appear in Phys. Rev.

Bis({tris[2-(3,5-di-tert-butyl-2-oxido­benzylideneamino)ethyl]amine}cerium(III)) diethyl ether solvate

The title compound, 2[Ce(C51H75N4O3)]·C4H10O, was obtained in high yield (92%) by reduction of (TRENDSAL)CeIVCl [TRENDSAL is N,N′,N′′-tris­(3,5-di-tert-butyl­salicyl­ide­natoamino)­triethyl­amine] with potassium in THF. The bulky tripodal TRENDSAL ligand effectively encapsulates the central CeIII cation with a Ce—N(imine) distance of 2.860 (2) Å and an average C—N(amine) distance of 2.619 Å within a distorted monocapped octahedral coordination

Bis(1H-pyrazole-κN 2)bis­(2,4,6-tri­isopropyl­benzoato-κO)cobalt(II)

The title compound, [Co(C16H23O2)2(C3H4N2)2] or (C3H4N2)2Co(O2CC6H2 iPr3-2,4,6), is a rare example of a tetra­coordinate cobalt(II) carboxyl­ate stabilized by ancillary N-heterocyclic ligands. The Co(II) ion resides on a crystallographic twofold axis so that the asymmetric unit comprises one half-mol­ecule. Due to the steric bulk of the 2,4,6-triisopropyl­phenyl substituents, the carboxyl­ate ligands are both coordinated in a monodentate fashion despite the low coordination number. The coordination geometry around the central Co(II) ion is distorted tetra­hedral with angles at Co ranging from 92.27 (18)° to 121.08 (14)°

Tris(N,N′-diisopropyl­benzamidinato)cerium(III)

The title compound, [Ce(C13H19N2)3], was obtained in moderate yield (67%) by treatment of anhydrous cerium trichloride with three equivalents of Li[PhC(NiPr)2] in tetra­hydro­furan. It is the first homoleptic lanthanide complex of this amidinate ligand. The central CeIII ion is coordinated by three chelating benzamidinate anions in a distorted octa­hedral fashion, with Ce—N distances in the narrow range 2.482 (2)–2.492 (2) Å. The dihedral angles between the phenyl rings and the chelating N—C—N units are in the range 73.3–87.9°, thus preventing conjugation between the two π-systems. The mol­ecule is located on a twofold rotation axis, and one of the phenyl rings is equally disordered over two alternative symmetry-equivalent positions around this axis