Crystal structures and Hirshfeld surface analyses of 6,8-dimethoxy-3-methyl-1<i>H</i>-isochromen-1-one and 5-bromo-6,8-dimethoxy-3-methyl-1<i>H</i>-isochromen-1-one chloroform monosolvate
Tiouabi, Mustapha; Tabacchi, Raphaël; Stoeckli-Evans, Helen; Acta Crystallographica Section E 76 (2020) 1107–1112; doi:10.1107/S2056989020007975

data_2243446
_publ_section_title
;
 Crystal structures and Hirshfeld surface analyses of
 6,8-dimethoxy-3-methyl-1<i>H</i>-isochromen-1-one and
 5-bromo-6,8-dimethoxy-3-methyl-1<i>H</i>-isochromen-1-one chloroform
 monosolvate
;
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              1107
_journal_page_last               1112
_journal_paper_doi               10.1107/S2056989020007975
_journal_volume                  76
_journal_year                    2020
_chemical_formula_iupac          'C12 H12 O4'
_chemical_formula_moiety         'C12 H12 O4'
_chemical_formula_sum            'C12 H12 O4'
_chemical_formula_weight         220.22
_chemical_name_systematic
;
6,8-Dimethoxy-3-methyl-1<i>H</i>-isochromem-1-one
;
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/3
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   12.7875(9)
_cell_length_b                   11.3732(12)
_cell_length_c                   14.3637(12)
_cell_measurement_reflns_used    10689
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      29.62
_cell_measurement_theta_min      1.72
_cell_volume                     2089.0(3)
_computing_cell_refinement
;
X-Area (Stoe & Cie, 2005)
;
_computing_data_collection
;
X-Area (Stoe & Cie, 2005)
;
_computing_data_reduction
;
X-RED32 (Stoe & Cie, 2005)
;
_computing_molecular_graphics
;
PLATON (Spek, 2020) and Mercury (Macrae <i>et al.</i>,  2020)
;
_computing_publication_material
;
<i>SHELXL2018/3</i> (Sheldrick, 2015), PLATON (Spek, 2020) and
publcif (Westrip, 2010)
;
_computing_structure_refinement
;
<i>SHELXL2018/3</i> (Sheldrick, 2015)
;
_computing_structure_solution
;
SHELXS97 (Sheldrick, 2008)
;
_diffrn_ambient_temperature      173(2)
_diffrn_detector                 'image plate (34 cm diameter)'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device       '2-circle goniometer'
_diffrn_measurement_device_type  'STOE IPDS 2'
_diffrn_measurement_method       '\f + \w scans'
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0765
_diffrn_reflns_av_unetI/netI     0.0358
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            24778
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.312
_diffrn_reflns_theta_min         2.785
_diffrn_source
'sealed X-ray tube, 12 x 0.4 mm long-fine focus'
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.9029
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
(MULABS; Spek, 2020)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.400
_exptl_crystal_description       block
_exptl_crystal_F_000             928
_exptl_crystal_size_max          0.360
_exptl_crystal_size_mid          0.280
_exptl_crystal_size_min          0.260
_refine_diff_density_max         0.221
_refine_diff_density_min         -0.181
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.054
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     148
_refine_ls_number_reflns         2835
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.054
_refine_ls_R_factor_all          0.0835
_refine_ls_R_factor_gt           0.0521
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0510P)^2^+0.3781P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1055
_refine_ls_wR_factor_ref         0.1157
_reflns_number_gt                1990
_reflns_number_total             2835
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            dj2010sup1.cif
_cod_data_source_block           I
_cod_database_code               2243446
_cod_database_fobs_code          2243446
_shelx_estimated_absorpt_t_min   0.963
_shelx_estimated_absorpt_t_max   0.973
_shelx_hkl_checksum              83460
_shelx_res_checksum              2362