Cationic, neutral and anionic metal(II) complexes derived from 4-oxo-4<i>H</i>-pyran-2,6-dicarboxylic acid (chelidonic acid)
Yasodha, Vaduganathan; Govindarajan, Subbaiah; Low, John N.; Glidewell, Christopher; Acta Crystallographica Section C 63 (2007) m207–m215; doi:10.1107/S010827010701459X

data_2015955
_publ_section_title
;
 Cationic, neutral and anionic metal(II) complexes derived from
 4-oxo-4<i>H</i>-pyran-2,6-dicarboxylic acid (chelidonic acid)
;
_journal_coeditor_code           LN3043
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              m207
_journal_page_last               m215
_journal_paper_doi               10.1107/S010827010701459X
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          '(N2 H6) [Ca (C7 H2 O6)2 (H2 O1)2]'
_chemical_formula_moiety         'H6 N2 2+ , C14 H8 Ca O14 2-'
_chemical_formula_sum            'C14 H14 Ca N2 O14'
_chemical_formula_weight         474.35
_chemical_name_systematic
;
hydrazinium(2+) diaqua(4-oxo-4H-pyran-2,6-dicarboxylato)calcate
;
_space_group_IT_number           13
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yc'
_symmetry_space_group_name_H-M   'P 1 2/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                 97.372(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.4669(2)
_cell_length_b                   7.0797(3)
_cell_length_c                   18.8278(6)
_cell_measurement_reflns_used    1953
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.52
_cell_measurement_theta_min      3.08
_cell_volume                     854.88(5)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997) and COLLECT'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        'DENZO and COLLECT'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL97 and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement  'OSCAIL and SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution
'OSCAIL (McArdle, 2003) and SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Bruker Nonius KappaCCD area-detector'
_diffrn_measurement_method       '\f and \w'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker Nonius FR591 rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0297
_diffrn_reflns_av_sigmaI/netI    0.0255
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            9031
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         3.08
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.457
_exptl_absorpt_correction_T_max  0.964
_exptl_absorpt_correction_T_min  0.909
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.843
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       lath
_exptl_crystal_F_000             488
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.680
_refine_diff_density_min         -0.544
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.204
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     141
_refine_ls_number_reflns         1953
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.204
_refine_ls_R_factor_all          0.0378
_refine_ls_R_factor_gt           0.0363
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0600P)^2^+0.7277P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1111
_refine_ls_wR_factor_ref         0.1161
_reflns_number_gt                1876
_reflns_number_total             1953
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ln3043.cif
_cod_data_source_block           II
_cod_original_sg_symbol_H-M      'P 2/c'
_cod_database_code               2015955
_cod_database_fobs_code          2015955