A Rational Approach to the Preparation ofPolydipyridyldiacetylenes: An Exercise in Crystal Design
Curtis, Sean M.; Le, Nam; Fowler, Frank W.; Lauher, Joseph W.; Crystal Growth & Design 5 (2005) 2313–; doi:10.1021/cg050204x

data_4505225
_publ_section_title
;
 A Rational Approach to the Preparation
 ofPolydipyridyldiacetylenes:&#x2009; An Exercise in Crystal Design
;
_journal_issue                   6
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              2313
_journal_paper_doi               10.1021/cg050204x
_journal_volume                  5
_journal_year                    2005
_chemical_formula_sum            'C20 H16 N4 O6'
_chemical_formula_weight         408.40
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 95.029(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   4.928(2)
_cell_length_b                   10.098(4)
_cell_length_c                   19.901(8)
_cell_measurement_temperature    293(2)
_cell_volume                     986.5(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.968
_diffrn_measured_fraction_theta_max 0.968
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0801
_diffrn_reflns_av_sigmaI/netI    0.2297
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            6027
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    0.104
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.375
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             424
_exptl_crystal_size_max          .7
_exptl_crystal_size_mid          .1
_exptl_crystal_size_min          .1
_refine_diff_density_max         0.210
_refine_diff_density_min         -0.229
_refine_diff_density_rms         0.060
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.348
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     140
_refine_ls_number_reflns         2412
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.348
_refine_ls_R_factor_all          0.2995
_refine_ls_R_factor_gt           0.0635
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0399P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1244
_refine_ls_wR_factor_ref         0.1803
_reflns_number_gt                1535
_reflns_number_total             2412
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg050204xsi20050508_085012.cif
_cod_data_source_block           1-ox:4-pda
_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_cell_volume        986.6(7)
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               4505225