Piperazine-1,4-diium diacetate
Hou, Shao-Gang; Acta Crystallographica Section E 67 (2011) o3292–; doi:10.1107/S1600536811047441

data_2233013
_publ_section_title
;
 Piperazine-1,4-diium diacetate
;
_journal_coeditor_code           XU5380
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3292
_journal_paper_doi               10.1107/S1600536811047441
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C4 H12 N2 2+, 2C2 H3 O2 -'
_chemical_formula_moiety         'C4 H12 N2 2+, 2(C2 H3 O2 -)'
_chemical_formula_sum            'C8 H18 N2 O4'
_chemical_formula_weight         206.24
_chemical_name_systematic
;
Piperazine-1,4-diium diacetate
;
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 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                 101.9040(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   13.17040(10)
_cell_length_b                   7.1820(2)
_cell_length_c                   5.7975(5)
_cell_measurement_reflns_used    647
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      27.47
_cell_measurement_theta_min      3.59
_cell_volume                     536.59(5)
_computing_cell_refinement       'CrystalClear (Rigaku, 2005)'
_computing_data_collection       'CrystalClear (Rigaku, 2005)'
_computing_data_reduction        'CrystalClear (Rigaku, 2005)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_detector_area_resol_mean 13.6612
_diffrn_measured_fraction_theta_full 0.966
_diffrn_measured_fraction_theta_max 0.966
_diffrn_measurement_device_type  'Rigaku Mercury2'
_diffrn_measurement_method       'CCD profile fitting'
_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  0.0182
_diffrn_reflns_av_sigmaI/netI    0.0240
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            1396
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         3.59
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.90
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrystalClear; Rigaku, 2005)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.276
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             224
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.288
_refine_diff_density_min         -0.256
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.108
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     40
_refine_ls_number_reflns         647
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.106
_refine_ls_R_factor_all          0.0519
_refine_ls_R_factor_gt           0.0476
_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^)+(0.0713P)^2^+0.3322P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1373
_refine_ls_wR_factor_ref         0.1403
_reflns_number_gt                582
_reflns_number_total             647
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            xu5380.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'C 2/m'
_cod_database_code               2233013
_cod_database_fobs_code          2233013