The Directly Determined Magnetic Susceptibilities of Copper Acetylacetonate and Diphenylpicrylhydrazyl Adsorbed on Silica Gel from 1.40 to 4.2°K.

Electron spin resonance and electron spin echo modulation studies of impregnated cupric ion in silica gel with different adsorbates

“…(1) 2Cu(I) -Cu(0) + Cu(II) (2) clusters and an oxide phase in the form of CuO. This is consistent with the observation of Cu2+-Cu2+ dimers by Surin et al3 on aging the sample at high temperature under vacuum.…”

Crystal structure of p-bis(dimethylhydroxysilyl)-benzene, a monomeric model of polytetramethyl-p-silphenylenesiloxane

“…When 70 < 1.5o-7o, the reflection was classed as unobserved in the present study. For the leastsquares refinement of atomic parameters the function minimized was 2w(F0 -Fc)2, wherein the weights w are defined by w = 1/<r f2 (1) In this expression, for observed reflections = y,<ru{LPh)-'h (2) while for unobserved reflections <7 Ft -1/iFo/1.0 = 1/lFf, (3) Preliminary values of the scale factor and mean isotropic temperature factor were deduced from a Wilson plot. The atomic form factors used in the structure factor calculations were those of Freeman6 for silicon, of Berghuis, et al,,7 for oxygen and carbon, and of Stewart, Davidson, and Simpson8 for hydrogen.…”