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The title compound [systematic name: 5-(tri­fluoro­meth­yl)pyridine-2-carb­oxy­lic acid monohydrate], C7H4F3NO2·H2O, is the acid hydrate of a pyridine with a carb­oxy­lic acid group and a tri­fluoro­methyl substituent situated para to one another on the aromatic ring. The mol­ecule forms a centrosymmetric water-bridged hydrogen-bonding dimer with graph-set notation R44 (12). Hydrogen-bonding distances of 2.5219 (11) and 2.8213 (11) Å are observed between the donor carb­oxy­lic acid and the bridging water acceptor, and the donor water and carbonyl oxygen acceptor, respectively. The dimers are further linked into a two-dimensional sheet via two longer inter­molecular hydrogen-bonding inter­actions between the second hydrogen atom on the bridging water mol­ecule and both a pyridine nitro­gen atom and carbonyl oxygen with distances of 3.1769 (11) and 2.8455 (11) Å, respectively. The tri­fluoro­methyl groups extend out the faces of the sheet providing for F...F and C—H...F contacts between the sheets, completing the three-dimensional packing. [ABSTRACT FROM AUTHOR]

Heterotrinuclear complexes with platinum(II) center resembling cisplatin and two ruthenium(III) centers attached to the platinum by bridging dinitrogen ligands are synthesized. These complexes are effective against neoplastic and metastatic cancers.

Triamidoamine zirconium complexes are shown to be effective catalysts for the heterodehydrocoupling of primary phosphines with silanes and germanes. This catalysis provides hydrogen-rich silyl- and germyphosphines otherwise accessible only to multistep stoichiometric syntheses.

Research has been conducted on bis(mercaptoimidazolyl)borate anion salt. The authors report that this salt can be obtained from NaBH (sub)4 and 2-mercapto-1-alkylimidazoles.

Research has been conducted on tris[(2-indolyl)methyl]amine. The authors report that this complex can be produced via the reaction of methyl 2-bromomethyl-1-indolecarboxylate with NH (sub)3 and via deprotection with NaOMe/MeOH.

The syntheses of various 2-dimensional titanium, vanadium and zirconium compounds based on 1,3- and 1,4-dialkoxybenzene in combination with pyridine and 4-phenylpyridine, and several structures where M = Ti are described. The interpenetration of the pleated sheets of the cis core (2-Ti) and a similar packing of rippled and planar sheets derived from trans cores provide the main impetus toward dense networks that are effectively devoid of intercalation chemistry.

Hydrodenitrogenation (HDN), the process by which nitrogen is removed form fossil fuels, is essential for minimizing NO(sub s) emissions. The reaction of Mo(PMe3)(sub 6) towards a variety of five and six-membered heterocyclic nitrogen compounds provide a series of complexes, including the first structurally characterized eta(super 6)-indolyl and eta(super 6)-(C5N)-quinoline derivatives, that may serve as structural models for the coordination of such heterocycles to molybdenum in heterogeneous HDN catalysts.

Research has been conducted on the hydrodesulfurization. The formation of the molybdenum thiophene adduct and butadiene-thiolate complex which are relevant to this hydrodesulfurization are described.

The title compound, [Ti(C24H33O2)Cl3(C4H8O)], is a rare example of a trigonal-bipyramidal titanium coordination complex with three chloride and two oxygen donor ligands. The asymmetric unit contains two independent molecules having essentially the same conformation. The molecules feature the titanium(IV) metal cation complexed with three chloride ligands, a tetrahydrofuran molecule, and one oxygen atom from the resolved ligand precursor (R)-(+)-5,5',6,6'-tetramethyl-3,3'-di-t-butyl-1,1'-biphenyl-2,2'-diol, where the remaining phenolic hydrogen atom engages in intermolecular O-H…Cl hydrogen bonding. In one molecule, the THF ligand is disordered over two orientations with refined site occupancies of 0.50 (3). [ABSTRACT FROM AUTHOR]

The two title compounds are analogs of 1-indanone that are substituted at the 6-position with chlorine and bromine. Although very similar in mol­ecular structure, the crystal structures are not isomorphous and reveal that 6-chloro­indan-1-one, C9H7ClO (I), and 6-bromo­indan-1-one, C9H7BrO (II), exhibit unique inter­molecular packing motifs. The mol­ecules of the chloro analog (I) pack with a herringbone packing motif of C—H⋯O inter­actions, whereas the bromo derivative (II) packs with offset face-to-face π-stacking, C—H⋯O, C—H⋯Br and Br⋯O inter­actions. Compound (II) was refined as a two-component non-merohedral twin, BASF 0.0762 (5). [ABSTRACT FROM AUTHOR]