Exploration and exploitation of homologous series of bis(acrylamido)alkanes containing pyridyl and phenyl groups: β-sheet versus two-dimensional layers in solid-state photochemical [2 + 2] reactions.
Garai, Mousumi; Biradha, Kumar; IUCrJ 2 (2015) 523–533; doi:10.1107/S2052252515009987

data_1556779
_publ_section_title
;
 Exploration and exploitation of homologous series of
 bis(acrylamido)alkanes containing pyridyl and phenyl groups: \b-sheet
 versus two-dimensional layers in solid-state photochemical
 [2&#x2005;+&#x2005;2] reactions.
;
_journal_issue                   'Pt 5'
_journal_name_full               IUCrJ
_journal_page_first              523
_journal_page_last               533
_journal_paper_doi               10.1107/S2052252515009987
_journal_volume                  2
_journal_year                    2015
_chemical_formula_moiety         'C18 H18 N4 O2'
_chemical_formula_sum            'C18 H18 N4 O2'
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_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                 96.451(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   4.7967(15)
_cell_length_b                   11.547(4)
_cell_length_c                   14.726(5)
_cell_measurement_reflns_used    1377
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.00
_cell_measurement_theta_min      2.25
_cell_volume                     810.5(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.965
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_device_type  'Bruker CCD APEX-2'
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_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
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_diffrn_reflns_limit_k_min       -13
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_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.25
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.990
_exptl_absorpt_correction_T_min  0.986
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             340
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.13
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_refine_diff_density_max         0.259
_refine_diff_density_min         -0.190
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_refine_ls_extinction_method     none
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_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0500P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1131
_refine_ls_wR_factor_ref         0.1403
_reflns_number_gt                478
_reflns_number_total             1377
_reflns_threshold_expression     >2sigma(I)
_publcif_datablock.id            {2840db9b-fa53-4f89-8b36-727154ea185d}
_cod_data_source_file            yc5005.cif
_cod_data_source_block           4b
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/IUCr/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
;
_cod_original_cell_volume        810.5(4)
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               1556779