trans-Diaquatetrakis(3,5-dimethylpyrazole-N2)nickel(II) dichloride.

The X-ray structure analysis of [Ni(C(5)H(8)N(2))(4)(H(2)O)(2)]Cl(2) was undertaken to elucidate the geometry around the Ni(2+) ion. The molecule lies on a twofold axis which runs through the O-Ni-O atoms. The geometry around the Ni(2+) ion is best described as slightly distorted tetragonal bipyramidal.

X-ray structure investigations of potential beta-blockers. II.6,7-Dimethoxy-1-phenyl-1,2,3,4-tetrahydroisoquinoline.

The saturated part of the isoquinoline moiety in the title compound, C17H19NO2, has a twist conformation and the phenyl ring substituent is in an equatorial position. The absolute configuration of the molecule is R and molecules form infinite chains by means of weak hydrogen bonds.