A Structurally Perfect S=1/2 Metal-Organic Hybrid Kagomé Antiferromagnet
Emily A. Nytko; Joel S. Helton; Peter Müller; Daniel G. Nocera; Journal of the American Chemical Society 130 (2008) 2922–2923; doi:10.1021/ja709991u

data_4107516
_publ_section_title
;
 A Structurally Perfect S=1/2 Metal-Organic Hybrid Kagom\'e
 Antiferromagnet
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2922
_journal_page_last               2923
_journal_paper_doi               10.1021/ja709991u
_journal_volume                  130
_journal_year                    2008
_chemical_formula_sum            'C8 H4 Cu O4'
_chemical_formula_weight         227.65
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           176
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  '-P 6c'
_symmetry_space_group_name_H-M   'P 63/m'
_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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            6
_cell_length_a                   9.1081(2)
_cell_length_b                   9.1081(2)
_cell_length_c                   15.9432(5)
_cell_measurement_reflns_used    9907
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.51
_cell_measurement_theta_min      2.56
_cell_volume                     1145.41(5)
_computing_cell_refinement       'SAINT 7 (Bruker-AXS, 2005)'
_computing_data_collection       'SMART 5 (Bruker-AXS, 2003)'
_computing_data_reduction        'SAINT 7 (Bruker-AXS, 2005)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker Smart APEX CCD'
_diffrn_measurement_method       'omega and phi scans'
_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  0.0247
_diffrn_reflns_av_sigmaI/netI    0.0070
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            25614
_diffrn_reflns_theta_full        29.57
_diffrn_reflns_theta_max         29.57
_diffrn_reflns_theta_min         2.56
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.831
_exptl_absorpt_correction_T_max  0.6761
_exptl_absorpt_correction_T_min  0.3435
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2005)'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.980
_exptl_crystal_description       plate
_exptl_crystal_F_000             678
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.528
_refine_diff_density_min         -0.633
_refine_diff_density_rms         0.097
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.098
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     64
_refine_ls_number_reflns         1119
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.098
_refine_ls_R_factor_all          0.0217
_refine_ls_R_factor_gt           0.0212
_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^)+(0.0387P)^2^+0.8901P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0667
_refine_ls_wR_factor_ref         0.0674
_reflns_number_gt                1086
_reflns_number_total             1119
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja709991u-file005.cif
_cod_data_source_block           07060
_cod_database_code               4107516