名称:
                                2′-(4-Chlorophenyl)-2,3,4,5,6,7-hexahydro-4′,7′-methanospiro[9H-fluorene-9,3′-1H-indazole]-1′-carbonitrile and methyl 4′-chloro-2′-(4-chlorophenyl)-1′-cyanospiro[9H-fluorene-9,3′-pyrazolidine]-4′-carboxylate
                             
                            
                                摘要:
                                The title compounds, C27H22ClN3, (IV), and C24H17Cl2N3O2, (V), were synthesized as part of our ongoing studies on (2+3)-cycloaddition reactions. Compound (V) crystallizes with two molecules in the asymmetric unit. The pyrazolidine ring of compound (IV) adopts a twisted conformation, while in compound (V) it adopts a twisted and an envolope conformation in the two molecules. There are short intermolecular contacts, which can be recognized as unconventional hydrogen bonds, in both structures.
                             
                                                            
                                    DOI:
                                    10.1107/s0108270107053619