# Electronic Supplementary Material (ESI) for Dalton Transactions # This journal is © The Royal Society of Chemistry 2013 ####################################################################### # # Cambridge Crystallographic Data Centre # CCDC # ####################################################################### # # This CIF contains data from an original supplementary publication # deposited with the CCDC, and may include chemical, crystal, # experimental, refinement, atomic coordinates, # anisotropic displacement parameters and molecular geometry data, # as required by the journal to which it was submitted. # # This CIF is provided on the understanding that it is used for bona # fide research purposes only. It may contain copyright material # of the CCDC or of third parties, and may not be copied or further # disseminated in any form, whether machine-readable or not, # except for the purpose of generating routine backup copies # on your local computer system. # # For further information on the CCDC, data deposition and # data retrieval see: # www.ccdc.cam.ac.uk # # Bona fide researchers may freely download Mercury and enCIFer # from this site to visualise CIF-encoded structures and # to carry out CIF format checking respectively. # ####################################################################### data_complex_1 _database_code_depnum_ccdc_archive 'CCDC 885040' #TrackingRef 'Complex1.cif' _audit_creation_method SHELXL-97 _chemical_name_systematic ; ? ; _chemical_name_common ? _chemical_melting_point ? _chemical_formula_moiety 'C36 H38 Ag2 Br4 N4 Se2' _chemical_formula_sum 'C36 H38 Ag2 Br4 N4 Se2' _chemical_formula_weight 1219.96 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' Se Se -0.0929 2.2259 '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' Ag Ag -0.8971 1.1015 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' _symmetry_cell_setting Monoclinic _symmetry_space_group_name_H-M 'P 21/c' _symmetry_space_group_name_Hall '-P 2ybc' loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x, y+1/2, -z+1/2' '-x, -y, -z' 'x, -y-1/2, z-1/2' _cell_length_a 11.534(2) _cell_length_b 13.521(2) _cell_length_c 12.778(2) _cell_angle_alpha 90.00 _cell_angle_beta 97.081(3) _cell_angle_gamma 90.00 _cell_volume 1977.6(5) _cell_formula_units_Z 2 _cell_measurement_temperature 298(2) _cell_measurement_reflns_used 6834 _cell_measurement_theta_min 2.20 _cell_measurement_theta_max 26.97 _exptl_crystal_description block _exptl_crystal_colour white _exptl_crystal_size_max 0.29 _exptl_crystal_size_mid 0.25 _exptl_crystal_size_min 0.21 _exptl_crystal_density_meas 2.049 _exptl_crystal_density_diffrn 2.049 _exptl_crystal_density_method 'not measured' _exptl_crystal_F_000 1168.0 _exptl_absorpt_coefficient_mu 6.903 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_correction_T_min 0.004 _exptl_absorpt_correction_T_max 0.025 _exptl_absorpt_process_details '(SADABS; Sheldrick, 1996)' _exptl_special_details ; ? ; _diffrn_ambient_temperature 298(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 'CCD area detector' _diffrn_measurement_method 'phi and omega scans' _diffrn_detector_area_resol_mean ? _diffrn_standards_number ? _diffrn_standards_interval_count ? _diffrn_standards_interval_time ? _diffrn_standards_decay_% ? _diffrn_reflns_number 18117 _diffrn_reflns_av_R_equivalents 0.0430 _diffrn_reflns_av_sigmaI/netI 0.0348 _diffrn_reflns_limit_h_min -13 _diffrn_reflns_limit_h_max 13 _diffrn_reflns_limit_k_min -16 _diffrn_reflns_limit_k_max 16 _diffrn_reflns_limit_l_min -15 _diffrn_reflns_limit_l_max 15 _diffrn_reflns_theta_min 1.78 _diffrn_reflns_theta_max 25.00 _reflns_number_total 3476 _reflns_number_gt 2933 _reflns_threshold_expression >2sigma(I) _computing_data_collection 'Bruker SMART' _computing_cell_refinement 'Bruker SMART' _computing_data_reduction 'Bruker SAINT' _computing_structure_solution 'SHELXS-97 (Sheldrick, 1990)' _computing_structure_refinement 'SHELXL-97 (Sheldrick, 1997)' _computing_molecular_graphics 'Bruker SHELXTL' _computing_publication_material 'Bruker SHELXTL' _refine_special_details ; Refinement of F^2^ against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F^2^, conventional R-factors R are based on F, with F set to zero for negative F^2^. The threshold expression of F^2^ > 2sigma(F^2^) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F^2^ 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 _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0279P)^2^+1.2960P] 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 constr _refine_ls_extinction_method none _refine_ls_extinction_coef ? _refine_ls_number_reflns 3476 _refine_ls_number_parameters 217 _refine_ls_number_restraints 0 _refine_ls_R_factor_all 0.0354 _refine_ls_R_factor_gt 0.0271 _refine_ls_wR_factor_ref 0.0683 _refine_ls_wR_factor_gt 0.0652 _refine_ls_goodness_of_fit_ref 1.052 _refine_ls_restrained_S_all 1.052 _refine_ls_shift/su_max 0.002 _refine_ls_shift/su_mean 0.000 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_symmetry_multiplicity _atom_site_calc_flag _atom_site_refinement_flags _atom_site_disorder_assembly _atom_site_disorder_group Ag1 Ag 1.05928(3) 0.01327(2) 0.39769(2) 0.05381(11) Uani 1 1 d . . . Br1 Br 0.90824(3) 0.14392(3) 0.45818(3) 0.04790(12) Uani 1 1 d . . . Br2 Br 1.26643(3) 0.09383(3) 0.38447(3) 0.04548(12) Uani 1 1 d . . . C1 C 0.8612(3) 0.0508(3) 0.1385(3) 0.0460(9) Uani 1 1 d . . . H1 H 0.8758 0.0810 0.2042 0.055 Uiso 1 1 calc R . . C2 C 0.7898(4) 0.0962(3) 0.0572(4) 0.0574(11) Uani 1 1 d . . . H2 H 0.7569 0.1576 0.0679 0.069 Uiso 1 1 calc R . . C3 C 0.7676(4) 0.0505(3) -0.0396(3) 0.0562(11) Uani 1 1 d . . . H3 H 0.7190 0.0811 -0.0935 0.067 Uiso 1 1 calc R . . C4 C 0.8159(4) -0.0388(3) -0.0571(3) 0.0541(10) Uani 1 1 d . . . H4 H 0.8000 -0.0689 -0.1228 0.065 Uiso 1 1 calc R . . C5 C 0.8887(4) -0.0852(3) 0.0223(3) 0.0475(9) Uani 1 1 d . . . H5 H 0.9226 -0.1458 0.0100 0.057 Uiso 1 1 calc R . . C6 C 0.9106(3) -0.0405(3) 0.1203(3) 0.0391(8) Uani 1 1 d . . . C7 C 0.9279(3) -0.2169(3) 0.2604(3) 0.0474(9) Uani 1 1 d . . . H7A H 0.8916 -0.2447 0.1944 0.057 Uiso 1 1 calc R . . H7B H 0.9816 -0.2661 0.2934 0.057 Uiso 1 1 calc R . . C8 C 0.8348(3) -0.2004(3) 0.3300(3) 0.0486(10) Uani 1 1 d . . . H8A H 0.7993 -0.2636 0.3429 0.058 Uiso 1 1 calc R . . H8B H 0.8707 -0.1752 0.3973 0.058 Uiso 1 1 calc R . . C9 C 0.7161(3) -0.0491(3) 0.3341(3) 0.0426(9) Uani 1 1 d . . . H9 H 0.7541 -0.0248 0.3973 0.051 Uiso 1 1 calc R . . C10 C 0.6673(3) -0.1434(3) 0.1961(3) 0.0460(9) Uani 1 1 d . . . H10 H 0.6662 -0.1951 0.1481 0.055 Uiso 1 1 calc R . . C11 C 0.5948(3) -0.0644(3) 0.1903(3) 0.0522(10) Uani 1 1 d . . . H11 H 0.5343 -0.0516 0.1369 0.063 Uiso 1 1 calc R . . C12 C 0.5694(5) 0.0839(3) 0.3105(4) 0.0717(14) Uani 1 1 d . . . H12A H 0.6105 0.1055 0.3774 0.086 Uiso 1 1 calc R . . H12B H 0.4900 0.0679 0.3219 0.086 Uiso 1 1 calc R . . C13 C 0.5661(3) 0.1675(3) 0.2340(3) 0.0464(9) Uani 1 1 d . . . C14 C 0.4776(4) 0.1785(3) 0.1518(4) 0.0655(13) Uani 1 1 d . . . H14 H 0.4191 0.1309 0.1410 0.079 Uiso 1 1 calc R . . C15 C 0.4747(5) 0.2587(4) 0.0856(4) 0.0852(18) Uani 1 1 d . . . H15 H 0.4146 0.2656 0.0305 0.102 Uiso 1 1 calc R . . C16 C 0.5619(6) 0.3290(4) 0.1018(4) 0.0754(15) Uani 1 1 d . . . H16 H 0.5604 0.3834 0.0571 0.090 Uiso 1 1 calc R . . C17 C 0.6486(4) 0.3197(4) 0.1812(4) 0.0674(13) Uani 1 1 d . . . H17 H 0.7068 0.3676 0.1913 0.081 Uiso 1 1 calc R . . C18 C 0.6519(4) 0.2393(3) 0.2479(3) 0.0537(10) Uani 1 1 d . . . H18 H 0.7125 0.2333 0.3028 0.064 Uiso 1 1 calc R . . N1 N 0.7429(2) -0.1318(2) 0.2869(2) 0.0357(7) Uani 1 1 d . . . N2 N 0.6263(3) -0.0068(2) 0.2767(3) 0.0452(8) Uani 1 1 d . . . Se1 Se 1.01883(3) -0.10162(3) 0.22781(3) 0.04508(12) Uani 1 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 Ag1 0.04592(19) 0.0586(2) 0.0554(2) 0.00111(15) 0.00034(14) -0.01072(14) Br1 0.0454(2) 0.0434(2) 0.0524(2) 0.00608(17) -0.00389(17) 0.00191(16) Br2 0.0361(2) 0.0450(2) 0.0552(2) 0.00505(17) 0.00474(17) -0.00563(15) C1 0.052(2) 0.046(2) 0.042(2) -0.0023(17) 0.0156(18) -0.0056(18) C2 0.063(3) 0.047(2) 0.066(3) 0.009(2) 0.021(2) 0.005(2) C3 0.052(2) 0.065(3) 0.051(3) 0.015(2) 0.003(2) -0.004(2) C4 0.060(3) 0.059(3) 0.042(2) -0.0051(19) 0.000(2) -0.013(2) C5 0.051(2) 0.046(2) 0.045(2) -0.0084(18) 0.0033(18) -0.0032(18) C6 0.0335(18) 0.042(2) 0.042(2) 0.0003(16) 0.0061(15) -0.0090(16) C7 0.038(2) 0.034(2) 0.067(3) -0.0009(18) -0.0037(19) 0.0044(16) C8 0.044(2) 0.041(2) 0.058(2) 0.0170(18) -0.0058(19) -0.0015(17) C9 0.050(2) 0.041(2) 0.0381(19) 0.0040(17) 0.0111(17) -0.0093(18) C10 0.045(2) 0.041(2) 0.049(2) -0.0041(17) -0.0036(18) -0.0034(17) C11 0.035(2) 0.063(3) 0.056(2) 0.014(2) -0.0058(18) 0.0014(19) C12 0.086(4) 0.057(3) 0.081(3) 0.015(2) 0.048(3) 0.024(2) C13 0.045(2) 0.045(2) 0.051(2) 0.0040(18) 0.0153(18) 0.0158(18) C14 0.039(2) 0.059(3) 0.094(3) -0.015(3) -0.008(2) 0.009(2) C15 0.097(4) 0.089(4) 0.060(3) -0.012(3) -0.028(3) 0.048(3) C16 0.121(5) 0.054(3) 0.055(3) 0.011(2) 0.025(3) 0.026(3) C17 0.068(3) 0.053(3) 0.085(4) -0.005(3) 0.023(3) -0.001(2) C18 0.043(2) 0.061(3) 0.054(2) -0.009(2) -0.0041(18) 0.010(2) N1 0.0302(15) 0.0334(15) 0.0432(17) 0.0055(13) 0.0035(13) -0.0041(12) N2 0.0492(19) 0.0398(17) 0.0497(19) 0.0091(15) 0.0185(16) 0.0077(15) Se1 0.0319(2) 0.0540(2) 0.0484(2) -0.00483(18) 0.00112(16) -0.00458(16) _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 Ag1 Br2 2.6501(6) . ? Ag1 Br1 2.6618(6) . ? Ag1 Se1 2.6633(6) . ? Ag1 Br1 2.8070(6) 3_756 ? Ag1 Ag1 3.1172(8) 3_756 ? Br1 Ag1 2.8070(6) 3_756 ? C1 C2 1.387(6) . ? C1 C6 1.391(5) . ? C1 H1 0.9300 . ? C2 C3 1.377(6) . ? C2 H2 0.9300 . ? C3 C4 1.361(6) . ? C3 H3 0.9300 . ? C4 C5 1.385(6) . ? C4 H4 0.9300 . ? C5 C6 1.385(5) . ? C5 H5 0.9300 . ? C6 Se1 1.925(4) . ? C7 C8 1.493(6) . ? C7 Se1 1.952(4) . ? C7 H7A 0.9700 . ? C7 H7B 0.9700 . ? C8 N1 1.464(4) . ? C8 H8A 0.9700 . ? C8 H8B 0.9700 . ? C9 N2 1.323(5) . ? C9 N1 1.325(5) . ? C9 H9 0.9300 . ? C10 C11 1.353(6) . ? C10 N1 1.371(5) . ? C10 H10 0.9300 . ? C11 N2 1.364(5) . ? C11 H11 0.9300 . ? C12 N2 1.480(5) . ? C12 C13 1.492(6) . ? C12 H12A 0.9700 . ? C12 H12B 0.9700 . ? C13 C14 1.380(6) . ? C13 C18 1.381(6) . ? C14 C15 1.373(7) . ? C14 H14 0.9300 . ? C15 C16 1.380(8) . ? C15 H15 0.9300 . ? C16 C17 1.340(7) . ? C16 H16 0.9300 . ? C17 C18 1.379(6) . ? C17 H17 0.9300 . ? C18 H18 0.9300 . ? 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 Br2 Ag1 Br1 111.91(2) . . ? Br2 Ag1 Se1 104.864(17) . . ? Br1 Ag1 Se1 124.652(18) . . ? Br2 Ag1 Br1 107.734(17) . 3_756 ? Br1 Ag1 Br1 110.558(17) . 3_756 ? Se1 Ag1 Br1 95.10(2) . 3_756 ? Br2 Ag1 Ag1 126.370(19) . 3_756 ? Br1 Ag1 Ag1 57.473(15) . 3_756 ? Se1 Ag1 Ag1 124.44(2) . 3_756 ? Br1 Ag1 Ag1 53.085(14) 3_756 3_756 ? Ag1 Br1 Ag1 69.442(17) . 3_756 ? C2 C1 C6 119.0(4) . . ? C2 C1 H1 120.5 . . ? C6 C1 H1 120.5 . . ? C3 C2 C1 120.1(4) . . ? C3 C2 H2 120.0 . . ? C1 C2 H2 120.0 . . ? C4 C3 C2 120.8(4) . . ? C4 C3 H3 119.6 . . ? C2 C3 H3 119.6 . . ? C3 C4 C5 120.3(4) . . ? C3 C4 H4 119.8 . . ? C5 C4 H4 119.8 . . ? C6 C5 C4 119.4(4) . . ? C6 C5 H5 120.3 . . ? C4 C5 H5 120.3 . . ? C5 C6 C1 120.4(3) . . ? C5 C6 Se1 119.2(3) . . ? C1 C6 Se1 120.3(3) . . ? C8 C7 Se1 116.9(3) . . ? C8 C7 H7A 108.1 . . ? Se1 C7 H7A 108.1 . . ? C8 C7 H7B 108.1 . . ? Se1 C7 H7B 108.1 . . ? H7A C7 H7B 107.3 . . ? N1 C8 C7 114.3(3) . . ? N1 C8 H8A 108.7 . . ? C7 C8 H8A 108.7 . . ? N1 C8 H8B 108.7 . . ? C7 C8 H8B 108.7 . . ? H8A C8 H8B 107.6 . . ? N2 C9 N1 108.9(3) . . ? N2 C9 H9 125.6 . . ? N1 C9 H9 125.6 . . ? C11 C10 N1 106.3(3) . . ? C11 C10 H10 126.9 . . ? N1 C10 H10 126.9 . . ? C10 C11 N2 107.8(3) . . ? C10 C11 H11 126.1 . . ? N2 C11 H11 126.1 . . ? N2 C12 C13 114.4(3) . . ? N2 C12 H12A 108.7 . . ? C13 C12 H12A 108.7 . . ? N2 C12 H12B 108.7 . . ? C13 C12 H12B 108.7 . . ? H12A C12 H12B 107.6 . . ? C14 C13 C18 118.3(4) . . ? C14 C13 C12 122.5(4) . . ? C18 C13 C12 119.2(4) . . ? C15 C14 C13 120.9(5) . . ? C15 C14 H14 119.6 . . ? C13 C14 H14 119.6 . . ? C14 C15 C16 119.3(5) . . ? C14 C15 H15 120.3 . . ? C16 C15 H15 120.3 . . ? C17 C16 C15 120.7(5) . . ? C17 C16 H16 119.7 . . ? C15 C16 H16 119.7 . . ? C16 C17 C18 120.2(5) . . ? C16 C17 H17 119.9 . . ? C18 C17 H17 119.9 . . ? C17 C18 C13 120.6(4) . . ? C17 C18 H18 119.7 . . ? C13 C18 H18 119.7 . . ? C9 N1 C10 108.8(3) . . ? C9 N1 C8 124.3(3) . . ? C10 N1 C8 126.9(3) . . ? C9 N2 C11 108.3(3) . . ? C9 N2 C12 122.8(4) . . ? C11 N2 C12 128.7(4) . . ? C6 Se1 C7 100.17(15) . . ? C6 Se1 Ag1 111.36(11) . . ? C7 Se1 Ag1 109.69(12) . . ? loop_ _geom_torsion_atom_site_label_1 _geom_torsion_atom_site_label_2 _geom_torsion_atom_site_label_3 _geom_torsion_atom_site_label_4 _geom_torsion _geom_torsion_site_symmetry_1 _geom_torsion_site_symmetry_2 _geom_torsion_site_symmetry_3 _geom_torsion_site_symmetry_4 _geom_torsion_publ_flag Br2 Ag1 Br1 Ag1 -120.10(2) . . . 3_756 ? Se1 Ag1 Br1 Ag1 112.01(2) . . . 3_756 ? Br1 Ag1 Br1 Ag1 0.0 3_756 . . 3_756 ? C6 C1 C2 C3 0.7(6) . . . . ? C1 C2 C3 C4 -0.7(6) . . . . ? C2 C3 C4 C5 -0.2(6) . . . . ? C3 C4 C5 C6 0.9(6) . . . . ? C4 C5 C6 C1 -0.9(6) . . . . ? C4 C5 C6 Se1 -176.5(3) . . . . ? C2 C1 C6 C5 0.1(6) . . . . ? C2 C1 C6 Se1 175.6(3) . . . . ? Se1 C7 C8 N1 61.4(4) . . . . ? N1 C10 C11 N2 -0.3(4) . . . . ? N2 C12 C13 C14 86.9(5) . . . . ? N2 C12 C13 C18 -95.9(5) . . . . ? C18 C13 C14 C15 -0.1(6) . . . . ? C12 C13 C14 C15 177.1(4) . . . . ? C13 C14 C15 C16 0.1(7) . . . . ? C14 C15 C16 C17 -0.1(8) . . . . ? C15 C16 C17 C18 0.1(7) . . . . ? C16 C17 C18 C13 0.0(7) . . . . ? C14 C13 C18 C17 0.1(6) . . . . ? C12 C13 C18 C17 -177.3(4) . . . . ? N2 C9 N1 C10 -0.3(4) . . . . ? N2 C9 N1 C8 -177.4(3) . . . . ? C11 C10 N1 C9 0.3(4) . . . . ? C11 C10 N1 C8 177.3(3) . . . . ? C7 C8 N1 C9 -121.2(4) . . . . ? C7 C8 N1 C10 62.2(5) . . . . ? N1 C9 N2 C11 0.1(4) . . . . ? N1 C9 N2 C12 176.0(3) . . . . ? C10 C11 N2 C9 0.1(4) . . . . ? C10 C11 N2 C12 -175.5(4) . . . . ? C13 C12 N2 C9 123.5(4) . . . . ? C13 C12 N2 C11 -61.5(6) . . . . ? C5 C6 Se1 C7 -70.7(3) . . . . ? C1 C6 Se1 C7 113.8(3) . . . . ? C5 C6 Se1 Ag1 173.4(3) . . . . ? C1 C6 Se1 Ag1 -2.2(3) . . . . ? C8 C7 Se1 C6 -78.8(3) . . . . ? C8 C7 Se1 Ag1 38.4(3) . . . . ? Br2 Ag1 Se1 C6 -102.53(11) . . . . ? Br1 Ag1 Se1 C6 28.23(11) . . . . ? Br1 Ag1 Se1 C6 147.59(11) 3_756 . . . ? Ag1 Ag1 Se1 C6 99.66(11) 3_756 . . . ? Br2 Ag1 Se1 C7 147.52(11) . . . . ? Br1 Ag1 Se1 C7 -81.72(12) . . . . ? Br1 Ag1 Se1 C7 37.64(12) 3_756 . . . ? Ag1 Ag1 Se1 C7 -10.30(12) 3_756 . . . ? _diffrn_measured_fraction_theta_max 1.000 _diffrn_reflns_theta_full 25.00 _diffrn_measured_fraction_theta_full 1.000 _refine_diff_density_max 0.526 _refine_diff_density_min -0.625 _refine_diff_density_rms 0.087