Crystal structure of 2-isopropyl-8-methyl-phenanthrene-3,4-dione, C18H16O2
Wu, Jichun; Luo, Guoyong; Liu, Yuchen; Yang, Wude; Zeitschrift für Kristallographie - New Crystal Structures 233 (2018) 721–722; doi:10.1515/ncrs-2018-0052

data_8106273
_publ_section_title
;
 Crystal structure of 2-isopropyl-8-methyl-phenanthrene-3,4-dione,
 C18H16O2
;
_journal_issue                   4
_journal_name_full
'Zeitschrift f\"ur Kristallographie - New Crystal Structures'
_journal_page_first              721
_journal_page_last               722
_journal_paper_doi               10.1515/ncrs-2018-0052
_journal_volume                  233
_journal_year                    2018
_chemical_formula_moiety         'C18 H16 O2'
_chemical_formula_sum            'C18 H16 O2'
_chemical_formula_weight         264.31
_space_group_crystal_system      orthorhombic
_space_group_IT_number           62
_space_group_name_Hall           '-P 2ac 2n'
_space_group_name_H-M_alt        'P n m a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.474(6)
_cell_length_b                   6.815(3)
_cell_length_c                   13.738(6)
_cell_measurement_reflns_used    912
_cell_measurement_temperature    173
_cell_measurement_theta_max      26.424
_cell_measurement_theta_min      2.814
_cell_volume                     1355.1(10)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      173
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.977
_diffrn_measurement_device_type  'Bruker APEX2'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0436
_diffrn_reflns_av_unetI/netI     0.0462
_diffrn_reflns_Laue_measured_fraction_full 0.985
_diffrn_reflns_Laue_measured_fraction_max 0.977
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            5354
_diffrn_reflns_point_group_measured_fraction_full 0.985
_diffrn_reflns_point_group_measured_fraction_max 0.977
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.430
_diffrn_reflns_theta_min         2.044
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6778
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2014/5 (Bruker,2014/5) was used for absorption correction. wR2(int) was 0.1052 before and 0.0523 after correction. The Ratio of minimum to maximum transmission is 0.9091. The \l/2 correction factor is 0.00150.'
_exptl_crystal_colour            red
_exptl_crystal_colour_primary    red
_exptl_crystal_density_diffrn    1.296
_exptl_crystal_description       block
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.368
_refine_diff_density_min         -0.475
_refine_diff_density_rms         0.149
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     120
_refine_ls_number_reflns         1633
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0806
_refine_ls_R_factor_gt           0.0583
_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^)+(0.1020P)^2^+0.0610P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1549
_refine_ls_wR_factor_ref         0.1759
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                1148
_reflns_number_total             1633
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            suppl_ncrs-2018-0052_suppl.cif
_cod_data_source_block           ds-3_0m
_cod_database_code               8106273
_shelx_estimated_absorpt_t_max   0.990
_shelx_estimated_absorpt_t_min   0.979
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Others
 Fixed Sof: H17a(0.5) H17b(0.5) H17c(0.5)
3.a Ternary CH refined with riding coordinates:
 C2(H2)
3.b Aromatic/amide H refined with riding coordinates:
 C13(H13), C8(H8), C14(H14), C16(H16), C10(H10), C9(H9)
3.c Idealised Me refined as rotating group:
 C17(H17a,H17b,H17c), C1(H1a,H1b,H1c)
;
_olex2_submission_special_instructions 'No special instructions were received'
_publcif_info_exptl_table_max_cols 4
_publcif_info_exptl_table_use_headnotes n
_publcif_funding_html
;
;