Crystal Structure and Topological Features of Two New Indene Derivatives

7-Bromo-5-( tert -butyl)-2-phenyl-1 H -indene ( 1 ) and 6,7-dibromo-2,4-dimethyl-2,3-dihydro-1 H -inden-1-one ( 2 ) are analyzed by single crystal X-ray diffraction. The conformational structure, vibrational spectrum of molecules, topology and hierarchical complexity of crystal structures are discussed. The structure of 1 is layered and contains (100) molecular layers of the tts topological type. The structure of 2 does not contain long molecular ensembles but demonstrates short Br⋯O contacts linking molecules into a centrosymmetric dimer.