Three Concomitant Crystal Forms of Monomeric Cobalt Chloride with 3-Pyridinemethanol.

Three new crystal forms of a mononuclear cobalt(II) chloride with 3-pyridinemethanol (3PM), CoCl2(3PM)4, have been prepared: triclinic (P1̄) and monoclinic (P21/c) polymorphs and its dihydrate which crystallises in the triclinic P1̄ space group. The three crystal forms differ by the orientation of 3PM ligands in the mononuclear entities and consequently in their packing arrangements. All three forms crystallise concomitantly.

Two concomitant polymorphs of monomeric nickel acetate with 2-pyridineethanol.

A new mononuclear nickel(II) acetate with 2-pyridineethanol, Ni(ac)2(2-PyEtOH)2 has been prepared. The reaction product is a mixture of two polymorphic forms that crystallize concomitantly: triclinic (PĪ) and monoclinic (P21/c). Their structures have been determined at 150 K.

Fluconazole-malonic acid (1/1).

Co-crystallizaton of the anti-fungal drug fluconazole [2-(2,4-difluoro-phen-yl)-1,3-bis-(1H-1,2,4-triazol-1-yl)propan-2-ol] with malonic acid in acetonitrile solution resulted in the formation of the title 1:1 co-crystal, C13H12F2N6O·C3H4O4. The geometry around the central fluconazole atom is distorted tetrahedral. The dihedral angles between the triazole rings and the fluorinated phenyl ring are 30.

Bis(acetato-κO)bis-[2-(pyridin-2-yl)ethanol-κ(2)N,O]copper(II).

The title compound, [Cu(CH(3)COO)(2)(C(7)H(9)NO)(2)], is a monomeric complex with an octa-hedral geometry. The Cu(II) atom is located on an inversion center and is coordinated by acetate and 2-(pyridin-2-yl)ethanol ligands. The acetate group is coordinated in a monodentate manner, while the 2-(pyridin-2-yl)ethanol is coordinated as a bidentate ligand involving the endocyclic N atom and the hy-droxy O atom of the ligand side chain.

A 1:1 cocrystal of fluconazole with salicylic acid.

The interaction of the antifungal pharmaceutical agent fluconazole with salicylic acid in acetonitrile solution yields the 1:1 cocrystal 2-(2,4-difluorophenyl)-1,3-bis(1H-1,2,4-triazol-1-yl)propan-2-ol-2-hydroxybenzoic acid (1/1), C(13)H(12)F(2)N(6)O·C(7)H(6)O(3). The asymmetric unit consists of one molecule of fluconazole and one molecule of salicylic acid, both in their neutral forms. Both crystal agents form head-to-tail hydrogen-bonded dimers, which are further connected into hydrogen-bonded extended zigzag tapes propagating along the ac diagonal.