Tetra-n-butyl­ammonium bis­(1,1-dicyano­ethyl­ene-2,2-dithiol­ato)platinum(II)

In the title compound, (C16H36N)2[Pt(C4N2S2)2], the PtII center adopts a distorted square-planar geometry due to the 4-membered chelate rings formed by coordination to the S atoms of the 1,1-dicyano­ethyl­ene-2,2-dithiol­ate (i-mnt) ligands [bite angle 74.35 (4)°]. The bond distances in the coordinated i-mnt ligands indicate some delocalization of the π-system

trans-Acetyldicarbonyl(g5 -cyclopentadienyl)(methyldiphenylphosphane)- molybdenum(II)

The title compound, [Mo(C5H5)(C2H3O)(C13H13P)(CO)2], was prepared by reaction of [Mo(CH3)(C5H5)(CO)3] with methyldiphenylphosphane. The MoII atom exhibits a fourlegged piano-stool coordination geometry with the acetyl and phosphane ligands trans to each other. There are several intermolecular C—HO hydrogen-bonding interactions involving carbonyl and acetyl O atoms as acceptors. A close nearly parallel – interaction between the cyclopentadienyl plane and the phenyl ring of the phosphane ligand is present, with an angle of 6.4 (1) between the two least-squares planes. The centroid-to-centroid distance between these groups is 3.772 (3) A˚ , and the closest distance between two atoms of these groups is 3.449 (4) A˚ . Since each Mo complex is engaged in two of these interactions, the complexes form an infinite - stack coincident with the a axis

Green Mechanochemical Synthesis of Photoluminescent Materials

Daron Janzen, Professor of Chemistry, received $7,500 from the APDC Grant fund to explore mechanochemical reactions to access Photoluminescent transition metal complexes. Photoluminescent metal complexes, materials that emit light, are used in a wide variety of applications including LEDs and sensors. Mechanochemistry involves performing chemical reactions by grinding reactants in the absence of solvent. This technique not only eliminates waste, but also can speed up results, increase yield, and provide access to products that cannot be obtained otherwise. Mechanochemistry is a technique that implements several features of Green Chemistry principles. Green Chemistry training and use in both the classroom and in research are a focus of the Chemistry department and build on the department\u27s participation in the Green Chemistry Commitment. This project aims to develop mechanochemical methods to synthesize metal complexes of variable difficulty, optimize reaction conditions, and explore variables including grinding media and frequency of grinding. A careful comparison of mechanochemical and typical solution reactions using green chemistry parameters will help us develop a framework for opportunities and limitations of this synthetic method

Tetra-n-butylammonium bis(2,2-dicyanoethylene-1,1-dithiolato)palladium(II)

In the title compound, (C16H36N)2[Pd(C4N2S2)2], the PdII center adopts a distorted square-planar geometry due to the four-membered chelate rings formed by coordination of the 2,2-dicyanoethylene-1,1-dithiolate (i-mnt) ligands [bite angle 75.0159 (17)°]. The bond distances in the coordinated i-mnt ligands indicate some delocalization of the π-system

Ammonium hydrogen bis[4-(2-phenyl-2H-tetrazol-5-yl)benzoate]

The title salt, NH4+·H+·2C14H9N4O2−, is composed of an ammonium cation with a strong intermolecular negatively charge-assisted hydrogen-bonded acid/conjugate base-pair monoanion. The carboxylic acid H atom is located on an inversion center, while the N atom of the ammonium cation is located on a twofold rotation axis. In the crystal, the N—H bonds of each ammonium cation act as donors with carboxylate O-atom acceptors to form chains along the a-axis direction. The chains are linked by offset π–π interactions [intercentroid distances = 3.588 (2) and 3.686 (2) Å], forming layers parallel to the ab plane

N,N-Dibutylanilinium hydrogen squarate

The title molecular salt, C14H24N+·C4HO4− [systematic name: N,N-dibutylbenzenaminium 2-hydroxy-3,4-dioxocyclobut-1-en-1-olate], is composed of a protonated N,N-dibutylaniline cation with a hydrogen squarate monoanion (common names). The disparate bond lengths within the squarate anion suggest delocalization of the negative charge over only part of the squarate moiety. In the crystal, the squarate anions are linked by pairs of O—H...O hydrogen bonds, forming inversion dimers with an R22(10) ring motif. The dimers are linked to the cations on either side by N—H...O hydrogen bonds, and weak C—H...O hydrogen bonds. These cation–anion–anion–cation units are linked by further C—H...O hydrogen bonds, forming layers parallel to (102)