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The title compound, o-benzoquinonediiminebis(o-phenylenediamine)ruthenium(II) hexafluorophosphate, has been synthesized and characterized by crystal structure, IR, UV–Vis and NMR spectroscopy.

The silver–gold ore deposits of the De Lamar mine, the mines in Florida Mountain and the mines in War Eagle Mountain occur in conjunction with large seams of clay minerals, which consist mainly of mixed-layer illite–beidellite. When saturated with groundwater, these clay seams have caused slope failures during mining and processing of ore. The illite–beidellite clays have effective internal friction values, O e , as low as 4° and cementation C values of about 1.0 kg f/cm 2 . The Fe-beidellite used for the clay core of the mill pond dam has an average O e value of 8.3° and C value of 0.79 kg f/cm 2 , with an average permeability ( K -value) of 5.6×10 −7 cm/s. The fundamental OH spectra of beidellite, illite and muscovite are similar with beidellite having bands near 3635, 3654 and 3653 cm −1 . Montmorillonite has one Al–OH libration band near 915 cm −1 , whereas beidellite has a second band near 942 cm −1 . In like manner, illites and muscovites have bands from 928 to 933 cm −1 , as well as the Al–OH libration bands from 912 to 917 cm −1 . The OH libration bands vary both in position and intensity with particle orientation and heating. Combination bands for Fe-bearing muscovite show moderate bands at 4451 cm −1 for ferrous muscovite and at 4471 cm −1 for ferric muscovite. These bands also are present for illites. The dominant Al–OH combination band wave numbers of muscovites form a linear relationship with the Al 2 O 3 muscovite contents, but not so precisely for illites. Chemical analysis of illites indicates that the compositions are a continuum into muscovites. Illites from the Miller–Walters mine contain a rather large amount of certain trace elements, whereas the adjacent beidellites do not.

Separate serpentine minerals may be identified by near infrared (NIR) spectra using remote sensing or portable field devices, and identified in the laboratory by NIR and mid-infrared spectra, but X-ray diffraction (XRD) procedures are necessary for rapid identification of serpentine mineral mixtures. Compacted serpentine aggregate material is very stable with a density of about 2400 kg/m 3 having an internal friction angle of about 32° with weak cementation. Non-fibrous clinochrysotile, the most common serpentine mineral in California deposits, consists of densely packed tubules from 600 to 700 A diameter, which are too short to be considered asbestiform. The Picrolite fibers are brittle and too large to be asbestiform.

Catalytic properties of dimeric molybdenum(VI) triketonates were compared to those of MoO 2 (acac) 2 in the epoxidation reaction of cyclooctene and 1,5-cyclooctadiene with tertiary butyl hydroperoxide. Studies of the reaction at a molar ratio of olefin:TBHP:catalyst= 1:1:0.001 for the monoolefin and 1:2:0.001 for the diolefin at 40 and 80 °C in dichloroethane were carried out. The dimeric Mo(VI) complexes preferentially catalyzed the production of a monoepoxide.

Catalytic properties of dimeric molybdenum(VI) triketonates were compared to those of MoO 2 (acac) 2 in the epoxidation reaction of cyclooctene and 1,5-cyclooctadiene with tertiary butyl hydroperoxide. Studies of the reaction at a molar ratio of olefin:TBHP:catalyst= 1:1:0.001 for the monoolefin and 1:2:0.001 for the diolefin at 40 and 80 °C in dichloroethane were carried out. The dimeric Mo(VI) complexes preferentially catalyzed the production of a monoepoxide.

The synthesis and characterization of a V(IV) and a V(V) complex of the salicyladimine ligand system are described. The reaction of salicylaldehyde and 1,3-diaminohydroxypropane with vanadyl sulfate produced a monomer (VOL1) which, upon heating in methanol, crystallized as a V(V) complex (VO(2)L1). The reaction of 3-methoxysalicylaldehyde, 1,3-diaminohydroxypropane, and vanadyl sulfate resulted in a binuclear complex held together by hydrogen bonding (VOL2). VOL1 was determined to catalyze the epoxidation of cyclohexene better than VOL2. The synthesis and characterization of VOL1, VOL2, and VO(2)L1 are described. The role of each complex as a catalyst for the epoxidation of cyclohexene is investigated. Results indicate that the V(V) complex performs better than either of the V(IV) complexes.

Cobalt(III) complexes have been used in the undergraduate inorganic laboratory to demonstrate various techniques in coordination chemistry. This report describes an experiment involving the synthesis and resolution of enantiomeric tris(ethylenediamine)cobalt(III) compounds followed by the analysis of enantiomeric purity by optical rotation and 59Co NMR spectroscopy through the formation of diastereomeric ion pairs.

A series of experiments based on aspirin have been used in our high school chemistry laboratory. Experiments include (i) synthesis, purification, and characterization of aspirin by mp and TLC, (ii) percentage composition of a commercial aspirin tablet by titration, (iii) kinetics of the hydrolysis of aspirin to salicylic acid under various conditions, (iv) synthesis and characterization of copper(II) aspirinate and copper(II) salicylate, and (v) reaction of copper(II) aspirinate in aqueous solution.

Complexes containing the soft acid metals Pt, Pd, Ag, and Au, with the ligand 1,3-dimethylimidazolium-2-dithiocarboxylate (L) have been synthesized and characterized by analytical data and infrared and electronic spectroscopy. The data suggest that the ligand acts as a bidentate ligand with Pt and Pd, a monodentate ligand with Ag and a bridging ligand between two Au atoms.

Two nickel(II) complexes, NiL 2 Cl 2 and NiL 2 – (NO 3 ) 2 ·0.3EtOH, with the ligand 1,3-dimethyl- imidazoliumdithiocarboxyalato (L) have been synthesized and characterized by infrared and electronic spectroscopy and magnetic susceptibilities. The complexes exhibit the normal paramagnetism characteristic of octahedral nickel(II). The magnetic moments decrease with falling temperature, indicative of antiferromagnetic coupling, which is greater for the chloride than for the nitrate adduct. Columnar structures with chloro and nitrato bridging are proposed.

Eine Anzahl von Untersuchungen haben einen zweikernigen Komplex mit dem Kern [FeOH]′2′ als Hydrolysespezies in Losungen von F e( III) aufgezeigt.

Complexes containing the soft acid metals Pt, Pd, Ag, and Au, with the ligand 1,3-dimethylimidazolium-2-dithiocarboxylate (L) have been synthesized and characterized by analytical data and infrared and electronic spectroscopy. The data suggest that the ligand acts as a bidentate ligand with Pt and Pd, a monodentate ligand with Ag and a bridging ligand between two Au atoms.

Two nickel(II) complexes, NiL 2 Cl 2 and NiL 2 – (NO 3 ) 2 ·0.3EtOH, with the ligand 1,3-dimethyl- imidazoliumdithiocarboxyalato (L) have been synthesized and characterized by infrared and electronic spectroscopy and magnetic susceptibilities. The complexes exhibit the normal paramagnetism characteristic of octahedral nickel(II). The magnetic moments decrease with falling temperature, indicative of antiferromagnetic coupling, which is greater for the chloride than for the nitrate adduct. Columnar structures with chloro and nitrato bridging are proposed.

The authors share a curriculum developed for a two-credit course in chemistry geared toward future elementary teachers.

Demonstrations of indicating tests for carbon dioxide, acidity, starch, and chloride aimed at upper elementary students.