π-Congested poly(paraphenylene) from 2,2′,6,6′-tetraphenyl-1,1′-biphenyl units: synthesis and structural characterization
Schlütter, Florian; Nishiuchi, Tomohiko; Enkelmann, Volker; Müllen, Klaus; Polymer Chemistry 4 (2013) 2963–; doi:10.1039/c3py00166k

data_1514890
_publ_section_title
;
 \p-Congested poly(paraphenylene) from
 2,2&#x2032;,6,6&#x2032;-tetraphenyl-1,1&#x2032;-biphenyl units: synthesis
 and structural characterization
;
_journal_issue                   10
_journal_name_full               'Polymer Chemistry'
_journal_page_first              2963
_journal_paper_doi               10.1039/c3py00166k
_journal_volume                  4
_journal_year                    2013
_chemical_formula_moiety         'C38 H30'
_chemical_formula_sum            'C38 H30'
_chemical_formula_weight         486.66
_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
_audit_creation_date             12-04-11
_audit_creation_method           CRYSTALS_ver_12.84
_cell_angle_alpha                90
_cell_angle_beta                 102.0571(18)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.3789(2)
_cell_length_b                   22.1571(8)
_cell_length_c                   16.3043(5)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    120
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     2606.87(14)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1997-2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SHELXS 86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      120
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.087
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -31
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            15957
_diffrn_reflns_theta_full        28.528
_diffrn_reflns_theta_max         30.029
_diffrn_reflns_theta_min         1.838
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.91
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SORTAV (Blessing)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.240
_exptl_crystal_description       needle
_exptl_crystal_F_000             1032
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.35
_refine_diff_density_min         -0.23
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.1061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     172
_refine_ls_number_reflns         2439
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0733
_refine_ls_R_factor_gt           0.0423
_refine_ls_shift/su_max          0.000232
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982)
[weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)]
where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax
Method = Robust Weighting (Prince, 1982)
W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^
A~i~ are:
1.27 0.475 0.810
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0661
_refine_ls_wR_factor_gt          0.0502
_refine_ls_wR_factor_ref         0.0502
_reflns_limit_h_max              10
_reflns_limit_h_min              -10
_reflns_limit_k_max              31
_reflns_limit_k_min              0
_reflns_limit_l_max              22
_reflns_limit_l_min              0
_reflns_number_gt                2439
_reflns_number_total             3797
_reflns_threshold_expression     I>3.0\s(I)
_cod_data_source_file            c3py00166k.txt
_cod_data_source_block           fs288n
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      'C 1 2/c 1 '
_cod_database_code               1514890