A triclinic polymorph of (<i>E</i>)-2-(1-hydroxy-3-phenylprop-2-en-1-ylidene)-4,5-dimethoxycyclopent-4-ene-1,3-dione
Hosseinzadeh, Masoumeh; Mukhtar, Mat Ropi; Khalilzadeh, Mohammad Ali; Khaledi, Hamid; Acta Crystallographica Section E 68 (2012) o453–; doi:10.1107/S1600536812001043

data_2233598
_publ_section_title
;
 A triclinic polymorph of
 (<i>E</i>)-2-(1-hydroxy-3-phenylprop-2-en-1-ylidene)-4,5-dimethoxycyclopent-4-ene-1,3-dione
;
_journal_coeditor_code           PV2504
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o453
_journal_paper_doi               10.1107/S1600536812001043
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          'C16 H14 O5'
_chemical_formula_moiety         'C16 H14 O5'
_chemical_formula_sum            'C16 H14 O5'
_chemical_formula_weight         286.27
_chemical_name_systematic
;
(<i>E</i>)-2-(1-hydroxy-3-phenylprop-2-en-1-ylidene)-
4,5-dimethoxycyclopent-4-ene-1,3-dione
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_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           SHELXL-97
_cell_angle_alpha                72.0700(10)
_cell_angle_beta                 83.0880(10)
_cell_angle_gamma                77.7600(10)
_cell_formula_units_Z            2
_cell_length_a                   5.4055(2)
_cell_length_b                   11.2731(3)
_cell_length_c                   11.6441(3)
_cell_measurement_reflns_used    2073
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.62
_cell_measurement_theta_min      2.25
_cell_volume                     658.59(3)
_computing_cell_refinement       'SAINT (Bruker, 2007)'
_computing_data_collection       'APEX2 (Bruker, 2007)'
_computing_data_reduction        'SAINT (Bruker, 2007)'
_computing_molecular_graphics
'X-SEED (Barbour, 2001) and XP in SHELXTL (Sheldrick, 2008)'
_computing_publication_material
'SHELXL97 (Sheldrick, 2008) and publCIF (Westrip, 2010)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.963
_diffrn_measured_fraction_theta_max 0.963
_diffrn_measurement_device_type  'Bruker APEXII CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0098
_diffrn_reflns_av_sigmaI/netI    0.0191
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3340
_diffrn_reflns_theta_full        25.25
_diffrn_reflns_theta_max         25.25
_diffrn_reflns_theta_min         2.25
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_T_max  0.9882
_exptl_absorpt_correction_T_min  0.9725
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.444
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             300
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.179
_refine_diff_density_min         -0.254
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     195
_refine_ls_number_reflns         2300
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0406
_refine_ls_R_factor_gt           0.0356
_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^)+(0.0544P)^2^+0.2122P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0936
_refine_ls_wR_factor_ref         0.0977
_reflns_number_gt                2041
_reflns_number_total             2300
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            pv2504.cif
_cod_data_source_block           I
_cod_database_code               2233598
_cod_database_fobs_code          2233598
loop_