Self-complementary hydrogen-bonded duplexes and helices based on bis(pyrrolyl)carbohydrazide derivatives
Hu, Dehui; Yang, Zhipei; Zhang, Guoqi; Liu, Min; Xiang, Junfeng; Liang, Tongling; Ma, Jinshi; Yang, Guoqiang; CrystEngComm 13 (2011) 6021–; doi:10.1039/c1ce05542a

data_7215423
_publ_section_title
;
 Self-complementary hydrogen-bonded duplexes and helices based on
 bis(pyrrolyl)carbohydrazide derivatives
;
_journal_issue                   20
_journal_name_full               CrystEngComm
_journal_page_first              6021
_journal_paper_doi               10.1039/c1ce05542a
_journal_volume                  13
_journal_year                    2011
_chemical_formula_moiety         'C21 H30 N6 O4, 0.5(H2 O)'
_chemical_formula_sum            'C21 H31 N6 O4.5'
_chemical_formula_weight         439.52
_space_group_IT_number           171
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'P 62'
_symmetry_space_group_name_H-M   'P 62'
_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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            6
_cell_length_a                   16.533(4)
_cell_length_b                   16.533(4)
_cell_length_c                   14.654(5)
_cell_measurement_reflns_used    2654
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      19.00
_cell_measurement_theta_min      2.83
_cell_volume                     3468.9(17)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0550
_diffrn_reflns_av_sigmaI/netI    0.0514
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            18887
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         1.99
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.9821
_exptl_absorpt_correction_T_min  0.9750
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.262
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1410
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.123
_refine_diff_density_min         -0.201
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -1.3(14)
_refine_ls_extinction_coef       0.0047(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   0.997
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     308
_refine_ls_number_reflns         4093
_refine_ls_number_restraints     39
_refine_ls_restrained_S_all      1.009
_refine_ls_R_factor_all          0.0797
_refine_ls_R_factor_gt           0.0412
_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^)+(0.0321P)^2^+0.6008P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0803
_refine_ls_wR_factor_ref         0.0910
_reflns_number_gt                2626
_reflns_number_total             4093
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1ce05542a.txt
_cod_data_source_block           60909a
_cod_original_sg_symbol_H-M      P62
_cod_original_formula_sum        'C21 H31 N6 O4.50'
_cod_database_code               7215423