Dihydroxybenzoquinone and chloranilic acid derivatives of rare earth metals
Abrahams, Brendan F.; Coleiro, Joseph; Ha, Karen; Hoskins, Bernard F.; Orchard, Simon D.; Robson, Richard; Journal of the Chemical Society, Dalton Transactions  (2002) 1586–; doi:10.1039/b109296k

data_7702749
_publ_section_title
;
 Dihydroxybenzoquinone and chloranilic acid derivatives of rare earth
 metals
;
_journal_issue                   8
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              1586
_journal_paper_doi               10.1039/b109296k
_journal_year                    2002
_chemical_formula_sum            'C18 H36 Ce2 Cl6 O30'
_chemical_formula_weight         1225.41
_chemical_name_systematic
; 
hexaaquatris(chloranilato)dicerium(III) hydrate 
;
_space_group_IT_number           12
_space_group_name_Hall           '-C 2y'
_space_group_name_H-M_alt        'C 1 2/m 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_atom_sites_solution_primary     heavy
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 92.83(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.376(2)
_cell_length_b                   16.598(3)
_cell_length_c                   11.224(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      15.4
_cell_measurement_theta_min      7.7
_cell_volume                     2116.7(7)
_computing_cell_refinement       'CAD4 - Software'
_computing_data_collection       'CAD4 - Software'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Enraf-Nonius CAD4 diffractometer'
_diffrn_measurement_method       \w:2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0155
_diffrn_reflns_av_sigmaI/netI    0.0305
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            3084
_diffrn_reflns_theta_full        27.55
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         1.82
_diffrn_standards_decay_%        6
_diffrn_standards_interval_time  160
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    2.596
_exptl_absorpt_correction_T_max  0.8025
_exptl_absorpt_correction_T_min  0.5931
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'SHELX-76 (Sheldrick, 1976)'
_exptl_crystal_colour            'deep purple'
_exptl_crystal_density_diffrn    1.923
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'rectangular prism'
_exptl_crystal_F_000             1204
_exptl_crystal_size_max          0.49
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.907
_refine_diff_density_min         -0.874
_refine_diff_density_rms         0.135
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.118
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     139
_refine_ls_number_reflns         2513
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.118
_refine_ls_R_factor_all          0.0430
_refine_ls_R_factor_gt           0.0340
_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^)+(0.0537P)^2^+4.1500P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0899
_refine_ls_wR_factor_ref         0.0939
_reflns_number_gt                2204
_reflns_number_total             2513
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b109296k.txt
_cod_data_source_block           cecanabs97
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7702749