An irreversible phase transition in 1-<i>n</i>-butylindeno[2,1-<i>c</i>]pyran-3,9-dione
Batsanov, Andrei S.; Howard, Judith A. K.; Wu, Na; Yang, Zhen; Marder, Todd B.; Acta Crystallographica Section C 68 (2012) o413–o416; doi:10.1107/S010827011203805X

data_2018611
_publ_section_title
;
 An irreversible phase transition in
 1-<i>n</i>-butylindeno[2,1-<i>c</i>]pyran-3,9-dione
;
_journal_coeditor_code           EM3055
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o413
_journal_page_last               o416
_journal_paper_doi               10.1107/S010827011203805X
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          'C16 H14 O3'
_chemical_formula_moiety         'C16 H14 O3'
_chemical_formula_sum            'C16 H14 O3'
_chemical_formula_weight         254.27
_chemical_melting_point          373.7(5)
_chemical_name_systematic
;
1-<i>n</i>-Butylindeno[2,1-<i>c</i>]pyran-3,9-dione
;
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method
;
Olex2 1.1-beta (compiled 2011.08.31 svn.r1945, GUI svn.r3824)
;
_cell_angle_alpha                82.481(5)
_cell_angle_beta                 88.127(7)
_cell_angle_gamma                78.604(6)
_cell_formula_units_Z            2
_cell_length_a                   4.6539(6)
_cell_length_b                   10.1800(12)
_cell_length_c                   14.3718(17)
_cell_measurement_reflns_used    1209
_cell_measurement_temperature    293
_cell_measurement_theta_max      21.85
_cell_measurement_theta_min      2.35
_cell_volume                     661.71(14)
_computing_cell_refinement       'SAINT (Bruker, 2008)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        'SAINT (Bruker, 2008)'
_computing_molecular_graphics    'OLEX2 (Dolomanov <i>et al.</i>, 2009)'
_computing_publication_material  'OLEX2 (Dolomanov <i>et al.</i>, 2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293
_diffrn_detector_area_resol_mean 5.6
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker SMART CCD 6000 area-detector'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0627
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            5329
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.43
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.276
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             268
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.102
_refine_diff_density_min         -0.138
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.840
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     185
_refine_ls_number_reflns         2336
_refine_ls_number_restraints     15
_refine_ls_restrained_S_all      0.841
_refine_ls_R_factor_all          0.1056
_refine_ls_R_factor_gt           0.0410
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0525P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0910
_refine_ls_wR_factor_ref         0.1099
_reflns_number_gt                1137
_reflns_number_total             2336
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            em3055.cif
_cod_data_source_block           aI
_cod_database_code               2018611
_cod_database_fobs_code          2018611