<i>r</i>-2,<i>c</i>-6-Bis(4-chlorophenyl)-<i>t</i>-3,<i>t</i>-5-dimethyltetrahydropyran-4-one
Jose Kavitha, Savaridasson; Sarangarajan, Thanjavur Ramabhadran; Thanikasalam, Kanagasabapathy; Panchanatheswaran, Krishnaswamy; Jeyaraman, Ramasubbu; Acta Crystallographica Section E 59 (2003) o463–o465; doi:10.1107/S1600536803005361

data_2201890
_publ_section_title
<i>r</i>-2,<i>c</i>-6-Bis(4-chlorophenyl)-<i>t</i>-3,<i>t</i>-5-dimethyltetrahydropyran-4-one
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o463
_journal_page_last               o465
_journal_paper_doi               10.1107/S1600536803005361
_journal_volume                  59
_journal_year                    2003
_chemical_formula_iupac          'C19 H18 Cl2 O2'
_chemical_formula_moiety         'C19 H18 Cl2 O2'
_chemical_formula_sum            'C19 H18 Cl2 O2'
_chemical_formula_weight         349.23
_chemical_melting_point          463.5(5)
_chemical_name_systematic
;
r-2,c-6-di(4-chlorophenyl)-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                   15.0130(10)
_cell_length_b                   9.1230(16)
_cell_length_c                   25.462(4)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12
_cell_measurement_theta_min      2
_cell_volume                     3487.4(9)
_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, 1997)'
_computing_publication_material  'SHELXL97 and PARST (Nardelli, 1983)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1993)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_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           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0412
_diffrn_reflns_av_sigmaI/netI    0.0282
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3164
_diffrn_reflns_theta_full        25.34
_diffrn_reflns_theta_max         25.34
_diffrn_reflns_theta_min         1.60
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 100
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.379
_exptl_absorpt_correction_T_max  0.9628
_exptl_absorpt_correction_T_min  0.9336
_exptl_absorpt_correction_type   '\y scan'
_exptl_absorpt_process_details   '(North et al., 1968)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.330
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1456
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.218
_refine_diff_density_min         -0.339
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.101
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         3163
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.101
_refine_ls_R_factor_all          0.0794
_refine_ls_R_factor_gt           0.0513
_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^)+(0.0478P)^2^+2.3284P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1152
_refine_ls_wR_factor_ref         0.1399
_reflns_number_gt                2205
_reflns_number_total             3163
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ci6205.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '463-464 K' was changed to '463.5(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 '463-464 K' was changed to '463.5(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               2201890
_cod_database_fobs_code          2201890