Bis[μ-3-(pyridin-2-yl)pyrazolato]bis-[acetato-(3,5-dimethyl-1-pyrazole)-nickel(II)].

The title compound, [Ni(CHN)(CHO)(CHN)] or [Ni(-OOCCH)(2-PyPz)(MePzH)] () [2-PyPz = 3-(pyridin-2-yl) pyrazole; MePzH = 3,5-dimethyl pyrazole] was synthesized from Ni(OOCCH)·4HO, 2-PyPzH, MePzH and tri-ethyl-amine as a base. Compound {[Ni(CHNNiO)]} at 100 K has monoclinic (2/) symmetry and the mol-ecules have crystallographic inversion symmetry. Mol-ecules of comprise an almost planar dinuclear Ni core with an NO coordination environment.

Crystal structure and Hirshfeld surface analysis of 6,6'-dimethyl-2,2'-bi-pyridine-1,1'-diium tetra-chlorido-cobaltate(II).

In the title mol-ecular salt, (CHN)[CoCl], the dihedral angle between the pyridine rings of the cation is 52.46 (9)° and the N-C-C-N torsion angle is -128.78 (14)°, indicating that the ring nitro-gen atoms are in -clinal conformation.

-Di-bromido-tetra-kis-(5-methyl-1-pyrazole-κ)manganese(II).

The title compound, -di-bromido-tetra-kis-(5-methyl-1-pyrazole-κ )manganese(II), [MnBr(CHN)] or [Mn(3-MePzH)Br] () crystallizes in the triclinic space group with the cell parameters = 7.6288 (3), = 8.7530 (4), = 9.

9-(4-Meth-oxy-phen-yl)-9-carbazole.

In the title compound, CHNO, the dihedral angle between the benzene rings of the carbazole moiety is 1.73 (12)° and the meth-oxy-substituted phenyl ring deviates from the mean plane of the carbazole grouping (r.m.

(3,5,6)-Di-phenyl-methyl 1-oxo-6-bromo-penicillanate.

In the title compound, CHBrNOS, a key inter-mediate in the synthesis of the widely used β-lactamase inhibitor tazobactam, the five-membered thia-zolidine ring adopts an envelope conformation and the four-membered azetidine ring is in a distorted planar conformation. The crystal structure features C-H⋯O hydrogen bonds and a weak C-H⋯π inter-action.

2-[(5-Chloro-pyridin-2-yl-imino)-meth-yl]phenol.

In the title compound, CHClNO, the dihedral angle between the aromatic rings is 1.78 (4)° and an intra-molecular O-H⋯N hydrogen bond closes an (6) ring. In the crystal, C-H⋯O and C-H⋯N hydrogen bonds connect the mol-ecules into [001] chains.