Coplanarity in the backbones of ladder-type oligo(p-phenylene) homologues and derivatives.
Wong, Ken-Tsung; Chi, Liang-Chen; Huang, Shih-Chiang; Liao, Yuan-Li; Liu, Yi-Hung; Wang, Yu; Organic letters 8 (2006) 5029–5032; doi:10.1021/ol061762n

data_1506191
_publ_section_title
;
 Coplanarity in the backbones of ladder-type oligo(p-phenylene) homologues
 and derivatives.
;
_journal_issue                   22
_journal_name_full               'Organic letters'
_journal_page_first              5029
_journal_page_last               5032
_journal_paper_doi               10.1021/ol061762n
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C57 H43 Cl2'
_chemical_formula_weight         798.81
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_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                 113.9880(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   28.4006(5)
_cell_length_b                   10.1973(3)
_cell_length_c                   16.7659(4)
_cell_measurement_reflns_used    57894
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      1
_cell_volume                     4436.19(19)
_computing_cell_refinement       'HKL Denzo & Scalepack (Otwinowski & Minor)'
_computing_data_collection       'COLLECT (Nonius BV)'
_computing_data_reduction        'HKL Denzo & Scalepack (Otwinowski & Minor)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0422
_diffrn_reflns_av_sigmaI/netI    0.0397
_diffrn_reflns_limit_h_max       33
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            10765
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.15
_exptl_absorpt_coefficient_mu    0.184
_exptl_absorpt_correction_T_max  0.993
_exptl_absorpt_correction_T_min  0.906
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
multi-scan from symmetry-related measurements 
 Sortav (Blessing 1995) 
;
_exptl_crystal_density_diffrn    1.196
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1676
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.840
_refine_diff_density_min         -0.239
_refine_diff_density_rms         0.079
_refine_ls_extinction_coef       0.0025(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.873
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     281
_refine_ls_number_reflns         3900
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.873
_refine_ls_R_factor_all          0.1374
_refine_ls_R_factor_gt           0.0960
_refine_ls_shift/su_max          0.020
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0300P)^2^+4.8000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2326
_refine_ls_wR_factor_ref         0.2401
_reflns_number_gt                2447
_reflns_number_total             3900
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol061762nsi20060718_032104.cif
_cod_data_source_block           ic11521
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1506191