Phosphonoacetic acid as a building block in supramolecular chemistry: salts with organic polyamines
Bowes, Katharine F.; Ferguson, George; Lough, Alan J.; Zakaria, Choudhury M.; Glidewell, Christopher; Acta Crystallographica Section B 59 (2003) 87–99; doi:10.1107/S010876810201858X

data_2103809
_publ_section_title
;
 Phosphonoacetic acid as a building block in supramolecular chemistry:
 salts with organic polyamines
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              87
_journal_page_last               99
_journal_paper_doi               10.1107/S010876810201858X
_journal_volume                  59
_journal_year                    2003
_chemical_formula_moiety         'C12 H14 N2, 2(C2 H4 O5 P)'
_chemical_formula_sum            'C16 H22 N2 O10 P2'
_chemical_formula_weight         464.30
_chemical_name_systematic
;
 1,2-Bis(4'-pyridyl)ethane--phosphonoacetic acid (1/2)
;
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 90.761(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.8501(3)
_cell_length_b                   15.1862(6)
_cell_length_c                   7.3741(3)
_cell_measurement_reflns_used    5037
_cell_measurement_temperature    150.0(10)
_cell_measurement_theta_max      27.51
_cell_measurement_theta_min      2.66
_cell_volume                     990.99(7)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Kappa-CCD server software (Nonius, 1997)'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'PLATON (Spek, 2002)'
_computing_publication_material
'SHELXL-97 (Sheldrick, 1997a) and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997a)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997b)'
_diffrn_ambient_temperature      150.0(10)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  Kappa-CCD
_diffrn_measurement_method       '\f scans, and \w scans with \k offsets'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed X-ray tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.035
_diffrn_reflns_av_sigmaI/netI    0.0531
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            6047
_diffrn_reflns_theta_full        27.51
_diffrn_reflns_theta_max         27.51
_diffrn_reflns_theta_min         2.66
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.279
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.556
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             484
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.308
_refine_diff_density_min         -0.438
_refine_ls_extinction_coef       0.011(3)
_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   1.064
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     139
_refine_ls_number_reflns         2263
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0478
_refine_ls_R_factor_gt           0.0382
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0431P)^2^+0.3391P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0969
_refine_ls_wR_factor_ref         0.1025
_reflns_number_gt                1883
_reflns_number_total             2263
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            bm0057.cif
_cod_data_source_block           VI
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               2103809
_cod_database_fobs_code          2103809