 
data_as5 
 
_audit_creation_method            SHELXL-97 
_chemical_name_systematic 
; 
 ? 
; 
_chemical_name_common             ? 
_chemical_formula_moiety          ? 
_chemical_formula_sum 
 'C8 H0 Br12 Cr2 Hg4 N8 O4' 
_chemical_formula_weight          2137.44 
 
loop_ 
 _atom_type_symbol 
 _atom_type_description 
 _atom_type_scat_dispersion_real 
 _atom_type_scat_dispersion_imag 
 _atom_type_scat_source 
 'C'  'C'   0.0033   0.0016 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'H'  'H'   0.0000   0.0000 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'N'  'N'   0.0061   0.0033 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'O'  'O'   0.0106   0.0060 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'Br'  'Br'  -0.2901   2.4595 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'Cr'  'Cr'   0.3209   0.6236 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'Hg'  'Hg'  -2.3894   9.2266 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 
_symmetry_cell_setting            ? 
_symmetry_space_group_name_H-M    ? 
 
loop_ 
 _symmetry_equiv_pos_as_xyz 
 'x, y, z' 
 '-x, -y, -z' 
 
_cell_length_a                    8.5128(11) 
_cell_length_b                    10.3890(15) 
_cell_length_c                    12.3851(19) 
_cell_angle_alpha                 97.971(18) 
_cell_angle_beta                  102.804(17) 
_cell_angle_gamma                 95.834(17) 
_cell_volume                      1047.8(3) 
_cell_formula_units_Z             1 
_cell_measurement_temperature     293(2) 
_cell_measurement_reflns_used     ? 
_cell_measurement_theta_min       ? 
_cell_measurement_theta_max       ? 
 
_exptl_crystal_description        ? 
_exptl_crystal_colour             ? 
_exptl_crystal_size_max           ? 
_exptl_crystal_size_mid           ? 
_exptl_crystal_size_min           ? 
_exptl_crystal_density_meas       ? 
_exptl_crystal_density_diffrn     3.387 
_exptl_crystal_density_method     'not measured' 
_exptl_crystal_F_000              924 
_exptl_absorpt_coefficient_mu     26.564 
_exptl_absorpt_correction_type    ? 
_exptl_absorpt_correction_T_min   ? 
_exptl_absorpt_correction_T_max   ? 
 
_exptl_special_details 
; 
 ? 
; 
 
_diffrn_ambient_temperature       293(2) 
_diffrn_radiation_wavelength      0.71073 
_diffrn_radiation_type            MoK\a 
_diffrn_radiation_source          'fine-focus sealed tube' 
_diffrn_radiation_monochromator   graphite 
_diffrn_measurement_device_type   ? 
_diffrn_measurement_method        ? 
_diffrn_detector_area_resol_mean  ? 
_diffrn_standards_number          ? 
_diffrn_standards_interval_count  ? 
_diffrn_standards_interval_time   ? 
_diffrn_standards_decay_%         ? 
_diffrn_reflns_number             7462 
_diffrn_reflns_av_R_equivalents   0.0604 
_diffrn_reflns_av_sigmaI/netI     0.0893 
_diffrn_reflns_limit_h_min        -10 
_diffrn_reflns_limit_h_max        10 
_diffrn_reflns_limit_k_min        -12 
_diffrn_reflns_limit_k_max        12 
_diffrn_reflns_limit_l_min        -15 
_diffrn_reflns_limit_l_max        15 
_diffrn_reflns_theta_min          2.00 
_diffrn_reflns_theta_max          26.02 
_reflns_number_total              3762 
_reflns_number_gt                 2346 
_reflns_threshold_expression      >2sigma(I) 
 
_computing_data_collection        ? 
_computing_cell_refinement        ? 
_computing_data_reduction         ? 
_computing_structure_solution     'SHELXS-97 (Sheldrick, 1990)' 
_computing_structure_refinement   'SHELXL-97 (Sheldrick, 1997)' 
_computing_molecular_graphics     ? 
_computing_publication_material   ? 
 
_refine_special_details 
; 
 Refinement of F² against ALL reflections.  The weighted R-factor wR and 
 goodness of fit S are based on F², conventional R-factors R are based 
 on F, with F set to zero for negative F². The threshold expression of 
 F² > 2sigma(F²) is used only for calculating R-factors(gt) etc. and is 
 not relevant to the choice of reflections for refinement.  R-factors based 
 on F² are statistically about twice as large as those based on F, and R- 
 factors based on ALL data will be even larger. 
; 
 
_refine_ls_structure_factor_coef  Fsqd  
_refine_ls_matrix_type            full 
_refine_ls_weighting_scheme 
 'calc w=1/[\s^2^(Fo^2^)+(0.1015P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' 
_atom_sites_solution_primary      direct 
_atom_sites_solution_secondary    difmap 
_atom_sites_solution_hydrogens    geom 
_refine_ls_hydrogen_treatment     mixed 
_refine_ls_extinction_method      none 
_refine_ls_extinction_coef        ? 
_refine_ls_number_reflns          3762 
_refine_ls_number_parameters      167 
_refine_ls_number_restraints      0 
_refine_ls_R_factor_all           0.0983 
_refine_ls_R_factor_gt            0.0646 
_refine_ls_wR_factor_ref          0.1708 
_refine_ls_wR_factor_gt           0.1567 
_refine_ls_goodness_of_fit_ref    0.953 
_refine_ls_restrained_S_all       0.953 
_refine_ls_shift/su_max           0.859 
_refine_ls_shift/su_mean          0.029 
 
loop_ 
 _atom_site_label 
 _atom_site_type_symbol 
 _atom_site_fract_x 
 _atom_site_fract_y 
 _atom_site_fract_z 
 _atom_site_U_iso_or_equiv 
 _atom_site_adp_type 
 _atom_site_occupancy 
 _atom_site_calc_flag 
 _atom_site_refinement_flags 
 _atom_site_disorder_assembly 
 _atom_site_disorder_group 
Hg1 Hg 0.08130(12) 0.19578(11) 0.54949(10) 0.0687(3) Uani 1 d . . . 
Hg2 Hg 0.02517(10) 0.45469(6) 0.83601(7) 0.0430(3) Uani 1 d . . . 
Br1 Br 0.1013(2) -0.01949(17) 0.65103(16) 0.0392(5) Uani 1 d . . . 
Br2 Br -0.2053(2) 0.37361(18) 0.92220(17) 0.0430(5) Uani 1 d . . . 
Br3 Br 0.2658(3) 0.3275(2) 0.84223(18) 0.0588(6) Uani 1 d . . . 
Br4 Br 0.3510(2) 0.26430(19) 0.50984(16) 0.0451(5) Uani 1 d . . . 
Br5 Br -0.1424(3) 0.32077(18) 0.59031(17) 0.0462(5) Uani 1 d . . . 
Br6 Br 0.0141(2) 0.67497(16) 0.76792(19) 0.0480(6) Uani 1 d . . . 
Cr1 Cr 0.5569(4) 0.8664(3) 0.8441(2) 0.0437(8) Uani 1 d . . . 
N11 N 0.503(2) 1.0489(17) 0.8113(17) 0.055(5) Uani 1 d . . . 
C11 C 0.576(4) 1.085(2) 0.714(3) 0.072(8) Uani 1 d . . . 
C12 C 0.740(4) 1.049(2) 0.731(3) 0.095(11) Uani 1 d . . . 
N12 N 0.744(2) 0.9108(13) 0.7646(15) 0.046(4) Uani 1 d . . . 
N21 N 0.409(2) 0.782(2) 0.6962(15) 0.056(5) Uani 1 d . . . 
C21 C 0.387(3) 0.601(2) 0.674(2) 0.066(6) Uiso 1 d . . . 
C22 C 0.547(4) 0.570(3) 0.738(2) 0.077(8) Uani 1 d . . . 
N22 N 0.620(2) 0.676(2) 0.8602(16) 0.069(6) Uani 1 d . . . 
O10 O 0.3775(19) 0.8460(19) 0.9204(13) 0.071(5) Uani 1 d . . . 
O20 O 0.7045(19) 0.9475(19) 0.9911(13) 0.074(5) Uani 1 d . . . 
 
loop_ 
 _atom_site_aniso_label 
 _atom_site_aniso_U_11 
 _atom_site_aniso_U_22 
 _atom_site_aniso_U_33 
 _atom_site_aniso_U_23 
 _atom_site_aniso_U_13 
 _atom_site_aniso_U_12 
Hg1 0.0384(6) 0.0945(7) 0.0890(7) 0.0341(6) 0.0327(5) 0.0185(5) 
Hg2 0.0354(5) 0.0311(4) 0.0714(5) 0.0232(3) 0.0194(4) 0.0114(3) 
Br1 0.0278(11) 0.0441(9) 0.0461(10) 0.0160(8) 0.0034(8) 0.0068(8) 
Br2 0.0348(11) 0.0464(10) 0.0470(10) 0.0064(9) 0.0136(9) -0.0043(9) 
Br3 0.0596(16) 0.0776(14) 0.0471(11) 0.0108(11) 0.0120(11) 0.0479(12) 
Br4 0.0353(11) 0.0561(11) 0.0460(10) 0.0094(9) 0.0180(9) -0.0031(9) 
Br5 0.0476(13) 0.0446(10) 0.0433(11) 0.0053(9) -0.0012(9) 0.0214(9) 
Br6 0.0405(12) 0.0297(8) 0.0710(14) 0.0252(9) -0.0016(10) 0.0023(8) 
Cr1 0.0195(16) 0.072(2) 0.0354(16) -0.0040(16) 0.0084(13) 0.0000(15) 
N11 0.032(10) 0.058(10) 0.072(12) -0.007(10) 0.018(9) 0.004(8) 
C11 0.07(2) 0.064(14) 0.10(2) 0.032(14) 0.030(16) 0.052(14) 
C12 0.07(2) 0.053(14) 0.18(4) 0.029(18) 0.05(2) 0.038(13) 
N12 0.052(11) 0.024(7) 0.068(11) 0.006(7) 0.027(9) 0.000(7) 
N21 0.039(11) 0.087(13) 0.046(10) 0.012(10) 0.013(8) 0.017(10) 
C22 0.070(19) 0.11(2) 0.050(13) 0.001(15) 0.003(13) 0.065(17) 
N22 0.054(13) 0.114(16) 0.059(12) 0.062(12) 0.020(10) 0.026(12) 
O10 0.044(9) 0.113(13) 0.050(9) -0.019(9) 0.030(8) -0.017(9) 
O20 0.037(9) 0.129(15) 0.046(8) 0.012(10) 0.007(7) -0.015(10) 
 
_geom_special_details 
; 
 All esds (except the esd in the dihedral angle between two l.s. planes) 
 are estimated using the full covariance matrix.  The cell esds are taken 
 into account individually in the estimation of esds in distances, angles 
 and torsion angles; correlations between esds in cell parameters are only 
 used when they are defined by crystal symmetry.  An approximate (isotropic) 
 treatment of cell esds is used for estimating esds involving l.s. planes. 
; 
 
loop_ 
 _geom_bond_atom_site_label_1 
 _geom_bond_atom_site_label_2 
 _geom_bond_distance 
 _geom_bond_site_symmetry_2 
 _geom_bond_publ_flag 
Hg1 Br4 2.507(2) . ? 
Hg1 Br5 2.513(2) . ? 
Hg1 Br1 2.716(2) . ? 
Hg1 Br1 2.896(2) 2_556 ? 
Hg2 Br3 2.541(2) . ? 
Hg2 Br6 2.5497(17) . ? 
Hg2 Br2 2.5576(19) . ? 
Hg2 Br5 3.119(2) . ? 
Br1 Hg1 2.896(2) 2_556 ? 
Cr1 O10 1.975(14) . ? 
Cr1 O20 1.986(15) . ? 
Cr1 N21 2.004(18) . ? 
Cr1 N11 2.07(2) . ? 
Cr1 N12 2.093(16) . ? 
Cr1 N22 2.13(2) . ? 
N11 C11 1.55(3) . ? 
C11 C12 1.46(4) . ? 
C12 N12 1.55(3) . ? 
N21 C21 1.85(3) . ? 
C21 C22 1.51(4) . ? 
C22 N22 1.70(3) . ? 
 
loop_ 
 _geom_angle_atom_site_label_1 
 _geom_angle_atom_site_label_2 
 _geom_angle_atom_site_label_3 
 _geom_angle 
 _geom_angle_site_symmetry_1 
 _geom_angle_site_symmetry_3 
 _geom_angle_publ_flag 
Br4 Hg1 Br5 132.89(8) . . ? 
Br4 Hg1 Br1 108.92(8) . . ? 
Br5 Hg1 Br1 112.44(7) . . ? 
Br4 Hg1 Br1 105.16(7) . 2_556 ? 
Br5 Hg1 Br1 98.86(7) . 2_556 ? 
Br1 Hg1 Br1 86.63(6) . 2_556 ? 
Br3 Hg2 Br6 123.38(8) . . ? 
Br3 Hg2 Br2 119.09(8) . . ? 
Br6 Hg2 Br2 117.16(8) . . ? 
Br3 Hg2 Br5 92.59(7) . . ? 
Br6 Hg2 Br5 87.78(7) . . ? 
Br2 Hg2 Br5 95.84(7) . . ? 
Hg1 Br1 Hg1 93.37(6) . 2_556 ? 
Hg1 Br5 Hg2 98.71(7) . . ? 
O10 Cr1 O20 88.9(6) . . ? 
O10 Cr1 N21 91.2(7) . . ? 
O20 Cr1 N21 179.2(9) . . ? 
O10 Cr1 N11 91.5(8) . . ? 
O20 Cr1 N11 90.7(8) . . ? 
N21 Cr1 N11 90.0(8) . . ? 
O10 Cr1 N12 173.4(7) . . ? 
O20 Cr1 N12 89.6(7) . . ? 
N21 Cr1 N12 90.3(7) . . ? 
N11 Cr1 N12 82.1(6) . . ? 
O10 Cr1 N22 93.9(8) . . ? 
O20 Cr1 N22 93.0(9) . . ? 
N21 Cr1 N22 86.2(8) . . ? 
N11 Cr1 N22 173.5(8) . . ? 
N12 Cr1 N22 92.6(7) . . ? 
C11 N11 Cr1 109.8(13) . . ? 
C12 C11 N11 108(2) . . ? 
C11 C12 N12 111(2) . . ? 
C12 N12 Cr1 110.9(15) . . ? 
C21 N21 Cr1 113.2(13) . . ? 
C22 C21 N21 104.7(18) . . ? 
C21 C22 N22 111.2(18) . . ? 
C22 N22 Cr1 111.2(13) . . ? 
 
_diffrn_measured_fraction_theta_max    0.909 
_diffrn_reflns_theta_full              26.02 
_diffrn_measured_fraction_theta_full   0.909 
_refine_diff_density_max    2.749 
_refine_diff_density_min   -3.884 
_refine_diff_density_rms    0.396 
