Bis(1-methyl-1-phenylethyl) peroxide
Su, Wei-Yi; Hou, Guang-Yang; Yin, Qiu-Xiang; Zhou, Li-Na; Acta Crystallographica Section E 64 (2008) o2128–; doi:10.1107/S1600536808033412

data_2219903
_publ_section_title
;
 Bis(1-methyl-1-phenylethyl) peroxide
;
_journal_coeditor_code           IS2340
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2128
_journal_paper_doi               10.1107/S1600536808033412
_journal_volume                  64
_journal_year                    2008
_chemical_formula_iupac          'C18 H22 O2'
_chemical_formula_moiety         'C18 H22 O2'
_chemical_formula_sum            'C18 H22 O2'
_chemical_formula_weight         270.36
_chemical_melting_point          315.15
_chemical_name_common            'dicumyl peroxide'
_chemical_name_systematic
;
Bis(1-methyl-1-phenylethyl) peroxide
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.040(2)
_cell_length_b                   7.4774(15)
_cell_length_c                   21.016(4)
_cell_measurement_reflns_used    8972
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.55
_cell_measurement_theta_min      3.53
_cell_volume                     1577.7(5)
_computing_cell_refinement       'RAPID-AUTO (Rigaku/MSC, 2004)'
_computing_data_collection       'RAPID-AUTO (Rigaku/MSC, 2004)'
_computing_data_reduction        'CrystalStructure (Rigaku/MSC, 2004)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID IP area-detector'
_diffrn_measurement_method       oscillation
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0767
_diffrn_reflns_av_sigmaI/netI    0.0667
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            11957
_diffrn_reflns_theta_full        25.49
_diffrn_reflns_theta_max         25.49
_diffrn_reflns_theta_min         3.53
_exptl_absorpt_coefficient_mu    0.072
_exptl_absorpt_correction_T_max  0.9892
_exptl_absorpt_correction_T_min  0.9821
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(<i>ABSCOR</i>; Higashi, 1995)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.138
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.264
_refine_diff_density_min         -0.175
_refine_ls_extinction_coef       0.027(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     92
_refine_ls_number_reflns         1464
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0520
_refine_ls_R_factor_gt           0.0433
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0556P)^2^+0.2734P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1048
_refine_ls_wR_factor_ref         0.1096
_reflns_number_gt                1232
_reflns_number_total             1464
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            is2340.cif
_cod_data_source_block           I
_cod_database_code               2219903
_cod_database_fobs_code          2219903