Abundant Polymorphism in a System with Multiple Hydrogen-Bonding Opportunities: Oxalyl Dihydrazide
Shinbyoung Ahn; Fang Guo; Benson M. Kariuki; Kenneth D. M. Harris; Journal of the American Chemical Society 128 (2006) 8441–8452; doi:10.1021/ja0573155

data_4110683
_publ_contact_author
;
K.D.M. Harris,
School of Chemistry, 
Cardiff University, Park Place, 
Cardiff CF10 3AT, Wales
;
_publ_contact_author_email       HarrisKDM@cardiff.ac.uk
_publ_section_title
;
 Abundant Polymorphism in a System with Multiple Hydrogen-Bonding
 Opportunities: Oxalyl Dihydrazide
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8441
_journal_page_last               8452
_journal_paper_doi               10.1021/ja0573155
_journal_volume                  128
_journal_year                    2006
_chemical_formula_moiety         'C2 H6 N4 O2'
_chemical_formula_sum            'C2 H6 N4 O2'
_chemical_formula_weight         118.11
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 114.160(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.0795(4)
_cell_length_b                   14.6679(14)
_cell_length_c                   7.0345(7)
_cell_measurement_reflns_used    593
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      69.94
_cell_measurement_theta_min      6.03
_cell_volume                     478.20(8)
_computing_cell_refinement       SAINTPLUS
_computing_data_collection       SMART
_computing_data_reduction        SAINTPLUS
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    SHELXTL
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.920
_diffrn_measured_fraction_theta_max 0.920
_diffrn_measurement_device_type  'Bruker Smart 6000 CCD'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0515
_diffrn_reflns_av_sigmaI/netI    0.0457
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            3013
_diffrn_reflns_theta_full        69.94
_diffrn_reflns_theta_max         69.94
_diffrn_reflns_theta_min         6.03
_exptl_absorpt_coefficient_mu    1.241
_exptl_absorpt_correction_T_max  0.9756
_exptl_absorpt_correction_T_min  0.7385
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.641
_exptl_crystal_description       needle
_exptl_crystal_F_000             248
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.226
_refine_diff_density_min         -0.258
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     89
_refine_ls_number_reflns         838
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0658
_refine_ls_R_factor_gt           0.0436
_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^)+(0.0633P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1029
_refine_ls_wR_factor_ref         0.1133
_reflns_number_gt                593
_reflns_number_total             838
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0573155si20051103_024327_3.cif
_cod_data_source_block           gamma
_cod_database_code               4110683