Ethyl 3-ferrocenyl-1-(pyridin-2-ylmeth­yl)-1H-pyrazole-5-carboxyl­ate

The title compound, [Fe(C₅H₅)(C₁₇H₁₆N₃O₂)], crystallizes with an essentially eclipsed conformation of the cyclo­penta­dienyl (Cp) rings. The unsubstituted ring is disordered over two positions with the major component being present 90 (1)% of the time. The substituted Cp ring, the pyrazole ring and three atoms of the eth­oxy­carbonyl group form a conjugated π-system. These 13 atoms are coplanar within 0.09 Å.

cis-Dichlorido[2-(3,5-dimethyl-1H-pyrazol-1-yl-κN²)ethanamine-κN]palladium(II) dichloro­methane monosolvate

In the title compound, [PdCl₂(C₇H₁₃N₃)]·CH₂Cl₂, the 2-(3,5-dimethyl-1H-pyrazol-1-yl)ethanamine ligand chelates the Pd^II atom via two N atoms forming a six-membered ring resulting in a distorted square-planar metal coordination environment, highlighted by N—Pd—Cl angles of 172.63 (8) and 174.98 (9)°. In addition to N—H...Cl hydrogen bonds creating infinite chains along [001], several C—H...Cl inter­actions are observed in the crystal structure.

(3,5-Di-tert-butyl-2-eth­oxy­benzyl­idene)[2-(3,5-di-tert-butyl-1H-pyrazol-1-yl)eth­yl]amine

The angles within the benzene ring in the title compound, C₃₀H₄₉N₃O, ranging from 116.34 (16) to 124.18 (16)°, reflect the presence of electron-donating and electron-withdrawing substituents. The angles at the two electron-donating tert-butyl substituents are smaller than 120°, at the electron-withdrawing eth­oxy substituent larger than 120°, and at the imine substituent equal to 119.59 (16)°. The latter does not reflect the electron-donating nature of the imine group due to the presence of other substituents.

1,2-Bis[(3,5-diphenyl-1H-pyrazol-1-yl)meth­yl]benzene

The title compound, C₃₈H₃₀N₄, a potentially mono- and bidentate ligand, does not seem to form palladium complexes similar to other poly(pyrazol-1-ylmeth­yl)benzenes due to the large steric size of the phenyl substituents on the pyrazole rings. The pyrazole rings have a 21.09 (5)° angle between their mean planes and exhibit a trans-like geometry in which the in-plane lone pairs of electrons on the 2-N nitrogen atoms point in opposite directions.