Three accurate X-ray diffraction experiments (Mo Kalpha, T = 190, 240 and 298 K) were carried out to track the temperature dependence of the electron density in the cubic perovskite potassium manganese trifluoride, KMnF3, from room temperature to just above that of the phase transition to the tetragonal structure (186 K), and to correlate the parameters of the critical points with the phase-tra...

In the title complex, [Mn(NCS)(2)(C(6)H(7)NO)(2)], the Mn(II) atom shows site symmetry 2. The distorted octa-hedral environment of Mn(II) is defined by two N atoms [Mn-N = 2.217 (4) and 2.132 (5) Å] and one O atom [Mn-O 2.305 (4) Å]. There are inter-molecular O-H⋯S hydrogen bonds and inter-molecular π-π stacking inter-actions between adjacent (2-pyrid-yl)methano-late ligands [centroid-centroid ...

At variance with what was previously reported, Mn2(CO)10 does not transform its conformation from staggered to eclipsed in the high pressure crystal form. X-ray powder diffraction, DFT calculations and Raman spectroscopy show that the staggered conformation is retained. Instead, a rotation and a translation of the Mn(CO)5 pyramidal units produce an "off-axis" and rather shorter Mn-Mn bond.

A rapid procedure is described to evaluate the significance of inorganic and organic pollutants in finegrained sediments. The air(< 30° C) or freeze-dried samples are screened within 30 min. in stainless steel sieves (<0.04 mm) prior to chemical analysis. This procedure is also suitable for analysis of such elements as Hg and many non-volatile organic pollutants. The sediment size fraction of <...

Background. Diabetes is an independent risk factor for coronary artery disease and portends adverse prognosis in diabetic patients undergoing percutaneous intervention (PCI) compared to nondiabetic patients. Few studies are currently available regarding the relationship between diabetes duration major cardiac events (MACEs) post-PCI. This study aimed at assessing association after PCI. Methods....

1 Department of Physical Medicine and Rehabilitation, University of Minnesota, Minneapolis, MN, USA 2 Department of Neurology, University of Minnesota, Minneapolis, MN, USA 3 Stroke Rehabilitation Research, Kessler Foundation, West Orange, NJ, USA 4 Clinical Neurorehabilitation, Department of Neurology, University of Zurich, Zurich, Switzerland 5 Department of Neurosurgery, University of Minnes...

Drinking water treatment facilities remove impurities from raw water sources using various chemicals. The by-product produced from the purification process is called water treatment residuals (WTR). If WTR contain residual chemicals from the purification process, soluble elements may be released potentially causing chemical imbalances in soil and groundwater systems. The study objectives were t...

In the title coupound, [Mn(C(9)H(6)O(4))(C(12)H(8)N(2))](n), the Mn(II) ion is coordinated by two N atoms [Mn-N = 2.273 (3) and 2.305 (2) Å] from a 1,10-phenanthroline ligand and four O atoms [Mn-O = 2.112 (2)-2.343 (3) Å] from three 5-methyl-isophthalate (mip) ligands in a distorted octa-hedral geometry. Each mip dianion acts as a tetra-dentate ligand connecting three Mn ions. The crystal pack...