<i>r</i>-2,<i>c</i>-6-Bis(<i>p</i>-tolyl)-<i>t</i>-3,<i>t</i>-5-dimethyltetrahydropyran-4-one
Krishnamoorthy, Belli Sundaram; Sarangarajan, Thanjavur Ramabhadran; Thanikasalam, Kanagasabapathy; Panchanatheswaran, Krishnaswamy; Jeyaraman, Ramasubbu; Acta Crystallographica Section E 59 (2003) o461–o462; doi:10.1107/S1600536803005336

data_2201883
_publ_section_title
<i>r</i>-2,<i>c</i>-6-Bis(<i>p</i>-tolyl)-<i>t</i>-3,<i>t</i>-5-dimethyltetrahydropyran-4-one
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o461
_journal_page_last               o462
_journal_paper_doi               10.1107/S1600536803005336
_journal_volume                  59
_journal_year                    2003
_chemical_formula_iupac          'C21 H24 O2'
_chemical_formula_moiety         'C21 H24 O2'
_chemical_formula_sum            'C21 H24 O2'
_chemical_formula_weight         308.40
_chemical_melting_point          413.5(5)
_chemical_name_systematic
;
r-2,c-6-Di(p-tolyl)-t-3,t-5-dimethyltetrahydropyran-4-one
;
_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            8
_cell_length_a                   9.0894(18)
_cell_length_b                   25.813(3)
_cell_length_c                   15.1605(10)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12
_cell_measurement_theta_min      2
_cell_volume                     3557.0(8)
_computing_cell_refinement       'CAD-4 Software'
_computing_data_collection       'CAD-4 Software (Enraf-Nonius, 1989)'
_computing_data_reduction        'MolEN (Fair, 1990)'
_computing_molecular_graphics
'ORTEP-3 for windows (Farrugia, 1997) and PLATON (Spek, 1998)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1993)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.957
_diffrn_measured_fraction_theta_max 0.958
_diffrn_measurement_device_type  'Enraf-Nonius CAD-4'
_diffrn_measurement_method       \w-2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0613
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3094
_diffrn_reflns_theta_full        67.90
_diffrn_reflns_theta_max         67.90
_diffrn_reflns_theta_min         4.50
_diffrn_standards_decay_%        negligible
_diffrn_standards_interval_count 10
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.565
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.152
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'non-transparent plate'
_exptl_crystal_F_000             1328
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.175
_refine_diff_density_min         -0.247
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.109
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     212
_refine_ls_number_reflns         3094
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.109
_refine_ls_R_factor_all          0.1547
_refine_ls_R_factor_gt           0.0744
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         <0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0255P)^2^+7.7276P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1564
_refine_ls_wR_factor_ref         0.1976
_reflns_number_gt                1561
_reflns_number_total             3094
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ci6198.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '413-414 K' was changed to '413.5(5)'
- the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_chemical_melting_point' value '413-414 K' was changed to '413.5(5)'
- the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_database_code               2201883
_cod_database_fobs_code          2201883