Six-membered-ring photocyclization in phenyl-substituted p-phenylenevinylene derivatives: a potential factor of instability in conjugated polymers
Liu, Linlin; Gao, Hongcheng; Li, Yupeng; Hanif, Muddasir; Li, Chuan; Gao, Yu; Yang, Bing; Xie, Zengqi; Ma, Yuguang; Polym. Chem. 7 (2016) 3496–; doi:10.1039/C6PY00180G

data_1543208
_publ_section_title
;
 Six-membered-ring photocyclization in phenyl-substituted
 p-phenylenevinylene derivatives: a potential factor of instability in
 conjugated polymers
;
_journal_issue                   21
_journal_name_full               'Polym. Chem.'
_journal_page_first              3496
_journal_paper_doi               10.1039/C6PY00180G
_journal_volume                  7
_journal_year                    2016
_chemical_formula_sum            'C39 H27 N'
_chemical_formula_weight         509.62
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2015-09-21 deposited with the CCDC.
2016-04-25 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 104.314(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.249(5)
_cell_length_b                   11.262(5)
_cell_length_c                   17.886(6)
_cell_measurement_temperature    293(2)
_cell_volume                     2781.1(18)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.1244
_diffrn_reflns_av_sigmaI/netI    0.1156
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            26273
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         3.04
_exptl_absorpt_coefficient_mu    0.070
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.217
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             1072
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent: '
_exptl_crystal_size_max          0.337
_exptl_crystal_size_mid          0.336
_exptl_crystal_size_min          0.058
_refine_diff_density_max         0.134
_refine_diff_density_min         -0.159
_refine_diff_density_rms         0.034
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.944
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     469
_refine_ls_number_reflns         6340
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.944
_refine_ls_R_factor_all          0.2170
_refine_ls_R_factor_gt           0.0685
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0527P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1133
_refine_ls_wR_factor_ref         0.1546
_reflns_number_gt                2294
_reflns_number_total             6340
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c6py00180g2.cif
_cod_data_source_block           lyp-1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/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 4268 2015-11-12 08:31:59Z antanas 

 Adding full bibliography for 1543207--1543208.cif.
;
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               1543208