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The structure of an iron porphyrin with dichlorocarbene as ligand has now been estabished by X-ray analysis. The complex (1) accordingly contains a planar Fe(TPP)skeleton with H2O and CCl2 as axial ligands. The structural unit (2) is almost linear.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxoanion supported organometallics: synthesis and characterization of .alpha.[(.eta.5-C5H5)Ti(PW11O39)]4-R. K. C. Ho and W. G. KlempererCite this: J. Am. Chem. Soc. 1978, 100, 21, 6772–6774Publication Date (Print):October 1, 1978Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow-temperature solution preparation of Group 4B, 5B and 6B transition-metal dichalcogenidesRussell R. Chianelli and Martin B. DinesCite this: Inorg. Chem. 1978, 17, 10, 2758–2762Publication Date (Print):October 1, 1978Publication History Published online1 May 2002Published…
The influence of Ar on the recrystallization of implanted amorphous silicon layers has been studied. Investigation of the growth kinetics at temperatures up to 575 °C showed that epitaxial regrowth of silicon is halted if the Ar concentration at the amorphous–single-crystal interface reaches about 1.5×1020 cm−3. Furth…
The electrical properties of thin sandwich cells (M/Pc/Au) have been studied in a quantitative fashion. Here, M is either aluminum or indium (150–400 Å thick), and Pc represents metalfree phthalocyanine (H2Pc) or its zinc complex (ZnPc). The phthalocyanines were ∼3000 Å thick. These devices were assembled by depositio…
In the present paper a diagrammatic analysis of the density operator for the evaluation of nonlinear optical quantities is considered. The present approach extends earlier diagrammatic analysis by treating the time evolution of both the wave function and its complex conjugate. Time-ordered graphs result, each of which…
A detailed discussion is given of the use and misuse of effective atomic numbers in the formulation of tissue substitute materials. An extension to the general concept is described, which permits a more rigorous application of the quantity to simulation studies. The practicalities of the new technique, called the Exte…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProduction of KH2PO4 from KCI and H3PO4 in an Organic Liquid MediumEliezer Rubin, Edward Szpruch, and Aluf OrellCite this: Ind. Eng. Chem. Process Des. Dev. 1978, 17, 4, 460–468Publication Date (Print):October 1, 1978Publication History Published online1 May 2002Published in…
The low-temperature magnetic structure of the hexagonal modification of FeGe has been determined by neutron diffraction methods. Below a transition temperature of 30.5+or-0.5K, the iron moments cant away from the (001) direction to form a double-coned structure in which alternate antiferromagnetically aligned (001) sh…
Epitaxy is the phenomenon in which the orientation of a crystal 0 which grows on a crystalline substrate S, usually different from 0, is related to that of S, even though their normal lattices do not match at their common interface. Apart from its fundamental interest, epitaxy is important in view of its application i…
Abstract The course of the chlorination reaction of cis ‐1,4‐polybutadiene is dependent on the choice of solvent. When methylene chloride is used, a pure addition reaction of chlorine leads to a polymer with the structure of head‐to‐head, tail‐to‐tail PVC. The thermal stability of the head‐to‐head PVC polymer has been…
An electro-optic display mechanism is described which uses a smectic A liquid crystal of positive dielectric anisotropy. Information can be written on the display, stored there without a sustaining voltage i.e. has a memory, and subsequently can be erased electrically. The erase mechanism involves a dielectric re-orie…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApplication of the UNIQUAC Equation to Calculation of Multicomponent Phase Equilibria. 2. Liquid-Liquid EquilibriaT. F. Anderson and J. M. PrausnitzCite this: Ind. Eng. Chem. Process Des. Dev. 1978, 17, 4, 561–567Publication Date (Print):October 1, 1978Publication History Pu…
Abstract Reflection, emission, and excitation spectra of CaS:Pb 2+ and CaSe:Pb 2+ are measured at 300, 80, and 6K. At higher concentrations of Pb 2+ ions, the emission and exeitation bands due to the Pb 2+ dimer are observed besides those of the Pb 2+ monomer. Theoretical calculation of energy levels of the dimer of T…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Yu Chan, James L. White, Yasushi Oyanagi; A Fundamental Study of the Rheological Properties of Gl…
In Sossi's formulation of the Fourier transform method of optical multilayer design the refractive-index profile is derived for an inhomogeneous layer of infinite extent having the desired spectral transmittance. This layer is then approximated by a finite system of discrete homogeneous layers. Because it does not mak…
Small-angle scattering studies on biological structures provide low-resolution models. More detailed models need a more elaborate analysis in order to show their uniqueness. The representation of small-angle scattering of both in Cartesian coordinates and polar coordinates is discussed. The degree of non-uniqueness of…
The A isozyme of yeast hexokinase (ATP:D-hexose 6-phosphotransferase, EC 2.7.1.1) crystallized as a complex with glucose has a conformation that is dramatically different from the conformation of the B isozyme crystallized in the absence of glucose. Comparison of the high-resolution structures shows that one lobe of t…
In a previous paper [Levitt, M., and Greer, J. (1977), J. Mol. Biol. 114, 181--239], an objective compilation of the secondary-structure regions in more than 50 different globular proteins was produced automatically. In the present paper, these assignments of secondary structure are analyzed to give the frequency of o…
A review is given of the present state of the theory of dynamic nuclear polarization (DNP) by the dipole electron-nucleus interaction in solids. The two-particle (solid effect), three-particle (electron-nucleus cross relaxation), and many-particle (dynamic cooling) mechanisms of DNP are discussed both for idealized co…