1',2',3',4'-Tetrahydro-1,3-diphenyl-4-p-tolylspiro[2-pyrazoline-5,2'-naphthalen]-1'-one

Abstract

In the title compound, C31H26N20, the pyrazoline ring is in a distorted sofa conformation, the cyclohexanone ring of the tetralone moiety is in a half-chair conformation and the other aromatic rings are planar. AbstractThe title steroidal carboxy-keto ether, C22H3204, forms non-centrosymmetric dimers involving two distinct carboxyl-to-ether hydrogen bonds [O...O = 2.718(3)

2-(1′,5′,5-Trimethyl-3,3′-bi-1H-pyrazol-1-yl)ethanol

“…The pyrazole-to-methyl bond lengths C11-C12 and C5-C6 (Table 1) are very close to those observed in 1-(p-nitrophenyl)-3-methyl-4-bromopyrazole (Lapasset & Falgueirettes, 1972). The N1-N2 and N3-N4 bond lengths are within the values [1.2348 (8)-1.385 (4) Å ] reported for N-N bonds in pyrazole rings (Krishna et al, 1999).…”

Ethyl 2-(5,1′,5′-trimethyl-3,3′-bi-1H-pyrazol-1-yl)acetate

“…The N1-N2 and N3-N4 distances agree well with bond lengths reported in related compounds [e.g. 1.385 (4) Å ; Krishna et al, 1999]. The pyrazole rings are nearly planar, the maximum deviations from their mean planes being 0.010 (4) Å for atom N4 and 0.006 (4) Å for atom C2.…”

2-[3-Phenyl-5-(m-Chlorophenyl)-2-Pyrazolin-1-yl]-3-Methyl-4(3H)-Quinazolinone

“…The dihedral angles between the pyrazoline ring and the phenyl ring attached to C10 is different in I and II with values of 26.4(3) • and 4.3(2) • , respectively. In 2-pyrazoline derivatives when N3 has no substitution, the N3 N4 bond shows a double-bond character [12]. When N3 has a phenyl ring, the single bond is found to be rather shorter as shown membered heterocyclic ring adopts the distorted envelope conformation.…”