α-Methylstyrene
Bond, Andrew D.; Davies, John E.; Acta Crystallographica Section E 58 (2002) o331–o333; doi:10.1107/S1600536802003392

data_2200864
_publ_section_title
;
 \a-Methylstyrene
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o331
_journal_page_last               o333
_journal_paper_doi               10.1107/S1600536802003392
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C9 H10'
_chemical_formula_moiety         'C9 H10'
_chemical_formula_sum            'C9 H10'
_chemical_formula_weight         118.17
_chemical_melting_point          250
_chemical_name_common            \a-methylstyrene
_chemical_name_systematic        isopropenylbenzene
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 93.230(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.7950(10)
_cell_length_b                   7.8290(10)
_cell_length_c                   15.8200(10)
_cell_measurement_reflns_used    2680
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      22.46
_cell_measurement_theta_min      1.00
_cell_volume                     716.60(16)
_computing_cell_refinement       'HKL SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1998)'
_computing_data_reduction
;
HKL DENZO and SCALEPACK (Otwinowski & Minor, 1997)
;
_computing_molecular_graphics
'XP (Sheldrick, 1993) and CAMERON (Watkin et al., 1996)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      180(2)
_diffrn_measured_fraction_theta_full .979
_diffrn_measured_fraction_theta_max .979
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       'Thin-slice \w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     .7107
_diffrn_reflns_av_R_equivalents  .0887
_diffrn_reflns_av_sigmaI/netI    .0683
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            3208
_diffrn_reflns_theta_full        22.32
_diffrn_reflns_theta_max         22.32
_diffrn_reflns_theta_min         3.68
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    .061
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.095
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cylinder
_exptl_crystal_F_000             256
_exptl_crystal_size_rad          .15
_refine_diff_density_max         .373
_refine_diff_density_min         -.265
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.148
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     83
_refine_ls_number_reflns         895
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.148
_refine_ls_R_factor_all          .1054
_refine_ls_R_factor_gt           .0846
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         .000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.1448P)^2^+0.2267P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          .2271
_refine_ls_wR_factor_ref         .2499
_reflns_number_gt                676
_reflns_number_total             895
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            cf6154.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2200864
_cod_database_fobs_code          2200864