Group 2 metal salts of pyromellitic acid: [Mg(H~2~O)~6~](C~10~H~4~O~8~) and [Ba(C~10~H~4~O~8~)(H~2~O)~5~]
Dale, Sophie H.; Elsegood, Mark R. J.; Kainth, Sarita; Acta Crystallographica Section C 59 (2003) m505–m508; doi:10.1107/S0108270103023175

data_2013721
_publ_section_title
;
 Group 2 metal salts of pyromellitic acid:
 [Mg(H~2~O)~6~](C~10~H~4~O~8~) and [Ba(C~10~H~4~O~8~)(H~2~O)~5~]
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              m505
_journal_page_last               m508
_journal_paper_doi               10.1107/S0108270103023175
_journal_volume                  59
_journal_year                    2003
_chemical_formula_iupac          '[Mg (H2 O)6] (C10 H4 O8)'
_chemical_formula_moiety         'H12 Mg O6 2+, C10 H4 O8 2-'
_chemical_formula_sum            'C10 H16 Mg O14'
_chemical_formula_weight         384.54
_chemical_name_systematic
;
hexaaquamagnesium(II) benzene-1,2,4,5-tetracarboxylate(2-)
;
_space_group_IT_number           10
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2y'
_symmetry_space_group_name_H-M   'P 1 2/m 1'
_atom_sites_solution_hydrogens   'Geom except OH coords freely refined'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   'All non-H atoms found by direct methods'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 115.148(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            1
_cell_length_a                   6.447(3)
_cell_length_b                   9.942(4)
_cell_length_c                   6.455(3)
_cell_measurement_reflns_used    1696
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.69
_cell_measurement_theta_min      3.49
_cell_volume                     374.5(3)
_computing_cell_refinement       'SAINT (Bruker, 2001)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material  'SHELXTL and local programs'
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 2000)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker SMART 1000 CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0219
_diffrn_reflns_av_sigmaI/netI    0.0241
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            2794
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.05
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.199
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.705
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             200
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.169
_refine_diff_density_min         -0.338
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.171
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     74
_refine_ls_number_reflns         771
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.168
_refine_ls_R_factor_all          0.0661
_refine_ls_R_factor_gt           0.0608
_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^)+(0.1034P)^2^+0.4203P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1641
_refine_ls_wR_factor_ref         0.1705
_reflns_number_gt                683
_reflns_number_total             771
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            tr1069.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (3 times).

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (3
times).

'_geom_angle_publ_flag' value 'Y' changed to 'y' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 2/m'
_cod_database_code               2013721