A hydrogen bonding motif for forming extended assemblies.
Zhang, Jiahui; Wu, Xiangxiang; Yamato, Kazuhiro; Liu, Futao; Su, Tianyi; Zheng, Chong; He, Lan; Gong, Bing; Chemical communications (Cambridge, England) 46 (2010) 1062–1064; doi:10.1039/b924008j

data_7105247
_publ_section_title
;
 A hydrogen bonding motif for forming extended assemblies.
;
_journal_issue                   7
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              1062
_journal_page_last               1064
_journal_paper_doi               10.1039/b924008j
_journal_volume                  46
_journal_year                    2010
_chemical_formula_sum            'C11 H14 N2 O2'
_chemical_formula_weight         206.24
_chemical_name_common            2a
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.000(5)
_cell_angle_beta                 96.382(5)
_cell_angle_gamma                90.000(5)
_cell_formula_units_Z            2
_cell_length_a                   6.545(5)
_cell_length_b                   9.091(5)
_cell_length_c                   9.249(5)
_cell_measurement_reflns_used    65
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      23
_cell_measurement_theta_min      -23
_cell_volume                     546.9(6)
_computing_cell_refinement       'SMART and SAINT (Siemens, 1995)'
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction        'SAINT (Siemens, 1995)'
_computing_molecular_graphics    'SHELXL-97 (Sheldrick, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 0
_diffrn_measured_fraction_theta_full 0.974
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'Siemens SMART CCD PLATFORM'
_diffrn_measurement_method       '\w 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  0.0226
_diffrn_reflns_av_sigmaI/netI    0.0702
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            3503
_diffrn_reflns_theta_full        27.93
_diffrn_reflns_theta_max         27.93
_diffrn_reflns_theta_min         2.22
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.758326
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.252
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       fragment
_exptl_crystal_F_000             220
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.212
_refine_diff_density_min         -0.315
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   3(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.079
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     136
_refine_ls_number_reflns         2372
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.079
_refine_ls_R_factor_all          0.0755
_refine_ls_R_factor_gt           0.0739
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0264P)^2^+0.4889P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1655
_refine_ls_wR_factor_ref         0.1666
_reflns_number_gt                2313
_reflns_number_total             2372
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b924008j.txt
_cod_data_source_block           4
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7105247