(S,S)-N,N′-Bis(1-carboxy-2-methylpropyl)ethylenediammonium dihalide cyclopentanol tetrasolvate (halide = bromide/chloride ≃ 1:12)

Ii Nn Ss Tt Rr Uu Cc Tt Ii Oo Nn Ss Ff Oo Rr Uu Ss E

(S,S)-N,N′-Bis(1-carb­oxy-2-methyl­prop­yl)ethyl­enediammonium dihalide cyclo­penta­nol tetra­solvate (halide = bromide/chloride ≃ 1:12)

In the crystal structure of the title compound, C(12)H(26)N(2)O(4) (2+)·2(Br(0.085)Cl(0.915))(-)·4C(5)H(9)OH, the complete cation is generated by crystallographic twofold symmetry. Contamination of the chloride counter-anion with bromide occured during the preparation, due to the use of 1,2-dibromo-ethane. One of the solvent mol-ecules is disordered, with occupancies 0.53 (3):0.47 (3). The crys...

Errata: Vol. 66, Nos. SS-1 and SS-2

In the Surveillance Summaries "Leading Causes of Death in Nonmetropolitan and Metropolitan Areas - United States, 1999-2014" and "Reducing Potentially Excess Deaths from the Five Leading Causes of Death in the Rural United States," an error occurred in Figure 5 and Figure 3, respectively. In the last panel of bar charts (stroke), the colors for the left-most set of bars (public health region 1)...

High-pressure polymorphism of cyclopentanol (C5H10O): the structure of cyclopentanol phase-V at 1.5 GPa.

The fully ordered high-pressure crystal structure of cyclopentanol (C5H10O) has been solved using single-crystal X-ray diffraction techniques on station 9.8 at the SRS Daresbury Laboratory. At pressures above 1.5 GPa, cyclopentanol crystallizes in the monoclinic P2(1)/c space group with a=17.882 (3), b=5.4573 (3), c=9.6817 (14) A, beta=104.699 (8) degrees and Z'=2. The crystal structure is char...

Classification of Silver Halide Microcrystals via K-nn Clustering of Their Shape Descriptors

A method for the classification of tabular grain silver halide microcrystals according to their shape is presented. Various approaches of shape analysis and recognition and their applicability for the given problem are discussed. Shape descriptors obtained from Fourier power spectra are used to describe the shape of microcrystals. The classification of the shapes is based on nearest neighborhoo...