# Electronic Supplementary Material (ESI) for Chemical Communications # This journal is © The Royal Society of Chemistry 2011 data_global _journal_coden_Cambridge 182 loop_ _publ_author_name 'Moyer, Bruce' 'Borman, Christopher' 'Custelcean, Radu' 'Hay, Benjamin' 'Bill, Nathan' 'Sessler, Jonathan' _publ_contact_author_name 'Moyer, Bruce' _publ_contact_author_email MOYERBA@ORNL.GOV _publ_section_title ; Supramolecular Organization of Calix[4]pyrrole with a Methyl-trialkylammonium Anion Exchanger Leads to Remarkable Reversal of Selectivity for Sulfate Extraction vs Nitrate ; # Attachment '- 1.cif' data_c:\docume~1\radu\mydocu~1\x-ray\343\343s _database_code_depnum_ccdc_archive 'CCDC 821449' #TrackingRef '- 1.cif' _audit_creation_method SHELXL-97 _chemical_name_systematic ; ? ; _chemical_name_common ? _chemical_melting_point ? _chemical_formula_moiety ? _chemical_formula_sum 'C42 H65 Cl4 N6 O6 S' _chemical_formula_weight 923.86 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' S S 0.1246 0.1234 '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' Cl Cl 0.1484 0.1585 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' _symmetry_cell_setting monoclinic _symmetry_space_group_name_H-M P2(1)/m loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x, y+1/2, -z' '-x, -y, -z' 'x, -y-1/2, z' _cell_length_a 10.6011(7) _cell_length_b 20.9725(15) _cell_length_c 11.2587(8) _cell_angle_alpha 90.00 _cell_angle_beta 91.6120(10) _cell_angle_gamma 90.00 _cell_volume 2502.2(3) _cell_formula_units_Z 2 _cell_measurement_temperature 173(2) _cell_measurement_reflns_used ? _cell_measurement_theta_min ? _cell_measurement_theta_max ? _exptl_crystal_description ? _exptl_crystal_colour ? _exptl_crystal_size_max 0.46 _exptl_crystal_size_mid 0.29 _exptl_crystal_size_min 0.12 _exptl_crystal_density_meas ? _exptl_crystal_density_diffrn 1.226 _exptl_crystal_density_method 'not measured' _exptl_crystal_F_000 982 _exptl_absorpt_coefficient_mu 0.326 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_correction_T_min 0.8645 _exptl_absorpt_correction_T_max 0.9619 _exptl_absorpt_process_details SADABS _exptl_special_details ; ? ; _diffrn_ambient_temperature 173(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 15435 _diffrn_reflns_av_R_equivalents 0.0331 _diffrn_reflns_av_sigmaI/netI 0.0459 _diffrn_reflns_limit_h_min -7 _diffrn_reflns_limit_h_max 14 _diffrn_reflns_limit_k_min -27 _diffrn_reflns_limit_k_max 26 _diffrn_reflns_limit_l_min -15 _diffrn_reflns_limit_l_max 14 _diffrn_reflns_theta_min 2.05 _diffrn_reflns_theta_max 28.32 _reflns_number_total 6353 _reflns_number_gt 4292 _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 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. There was significant disorder in the NMe4 cations that could not be completely resolved. As a result, some Me groups in NMe4 were refined isotropiocally. Hydrogen atoms in some of the disordered Me groups were not included in the structure model. The ethanol molecule included in the crystal displayed moderate disorder and was therefore refined isotropically. The OH hydrogen could not be located from the Fourier map and was not included in the final model. The source of the relatively large R1 factor could not be identified, and is presumably a result of partial twinning. ; _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^)+(0.2000P)^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 constr _refine_ls_extinction_method none _refine_ls_extinction_coef ? _refine_ls_number_reflns 6353 _refine_ls_number_parameters 282 _refine_ls_number_restraints 0 _refine_ls_R_factor_all 0.1829 _refine_ls_R_factor_gt 0.1469 _refine_ls_wR_factor_ref 0.4435 _refine_ls_wR_factor_gt 0.4100 _refine_ls_goodness_of_fit_ref 1.684 _refine_ls_restrained_S_all 1.684 _refine_ls_shift/su_max 0.001 _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 Cl1 Cl -0.0678(3) 0.06302(12) 0.3455(3) 0.1225(12) Uani 1 1 d . . . S1 S 0.21525(13) 0.2500 0.53878(11) 0.0264(4) Uani 1 2 d S . . O1 O 0.0926(5) 0.2500 0.4815(4) 0.075(2) Uani 1 2 d S . . N1 N 1.1620(3) 0.13602(16) 0.8160(3) 0.0265(8) Uani 1 1 d . . . H5 H 1.1772 0.1597 0.7536 0.032 Uiso 1 1 calc R . . C1 C 1.2529(4) 0.1143(2) 0.8983(4) 0.0293(9) Uani 1 1 d . . . Cl2 Cl -0.2786(4) 0.08373(19) 0.1870(5) 0.187(2) Uani 1 1 d . . . O2 O 0.2892(5) 0.1948(2) 0.5065(4) 0.0667(14) Uani 1 1 d . . . N2 N 0.9422(4) 0.2500 0.7622(4) 0.0242(10) Uani 1 2 d S . . H2 H 1.0130 0.2500 0.7232 0.029 Uiso 1 2 calc SR . . C2 C 1.1910(5) 0.0782(2) 0.9798(5) 0.0384(11) Uani 1 1 d . . . H14 H 1.2289 0.0565 1.0457 0.046 Uiso 1 1 calc R . . O3 O 0.2001(4) 0.2500 0.6716(3) 0.0272(9) Uani 1 2 d S . . N3 N 1.3815(4) 0.2500 0.8738(4) 0.0229(10) Uani 1 2 d S . . H7 H 1.3376 0.2500 0.8063 0.028 Uiso 1 2 calc SR . . C3 C 1.0605(4) 0.0791(2) 0.9488(5) 0.0349(11) Uani 1 1 d . . . H22 H 0.9956 0.0585 0.9908 0.042 Uiso 1 1 calc R . . O4 O 0.4043(12) 0.1206(6) 0.3475(11) 0.196(5) Uiso 1 1 d . . . N4 N 0.0974(5) 0.2500 0.1619(4) 0.0305(12) Uani 1 2 d S . . C4 C 1.0445(4) 0.1147(2) 0.8476(4) 0.0286(9) Uani 1 1 d . . . N5 N 0.6421(6) 0.2500 0.4695(6) 0.098(4) Uani 1 2 d S . . C5 C 0.9272(4) 0.1290(2) 0.7726(4) 0.0327(10) Uani 1 1 d . . . C6 C 0.8795(4) 0.1962(2) 0.7966(4) 0.0261(9) Uani 1 1 d . . . C7 C 0.7770(4) 0.2160(2) 0.8572(4) 0.0329(10) Uani 1 1 d . . . H16 H 0.7164 0.1893 0.8930 0.039 Uiso 1 1 calc R . . C8 C 1.4856(4) 0.2171(3) 1.0326(4) 0.0412(12) Uani 1 1 d . . . H24 H 1.5245 0.1906 1.0915 0.049 Uiso 1 1 calc R . . C9 C 1.4205(4) 0.1965(2) 0.9338(4) 0.0276(9) Uani 1 1 d . . . C10 C 1.3914(4) 0.1295(2) 0.8880(4) 0.0319(10) Uani 1 1 d . . . C11 C 0.9540(5) 0.1216(3) 0.6390(5) 0.0417(12) Uani 1 1 d . . . H20A H 1.0174 0.1529 0.6162 0.063 Uiso 1 1 calc R . . H20B H 0.8759 0.1286 0.5921 0.063 Uiso 1 1 calc R . . H20C H 0.9856 0.0785 0.6240 0.063 Uiso 1 1 calc R . . C12 C 0.8242(5) 0.0813(2) 0.8079(6) 0.0459(13) Uani 1 1 d . . . H23A H 0.8538 0.0377 0.7943 0.069 Uiso 1 1 calc R . . H23B H 0.7474 0.0891 0.7596 0.069 Uiso 1 1 calc R . . H23C H 0.8060 0.0868 0.8921 0.069 Uiso 1 1 calc R . . C13 C 1.4317(4) 0.1237(2) 0.7569(4) 0.0356(11) Uani 1 1 d . . . H18A H 1.4145 0.0803 0.7282 0.053 Uiso 1 1 calc R . . H18B H 1.5221 0.1327 0.7521 0.053 Uiso 1 1 calc R . . H18C H 1.3839 0.1543 0.7078 0.053 Uiso 1 1 calc R . . C14 C 1.4685(5) 0.0807(3) 0.9621(6) 0.0544(16) Uani 1 1 d . . . H25A H 1.4486 0.0853 1.0462 0.082 Uiso 1 1 calc R . . H25B H 1.5588 0.0884 0.9521 0.082 Uiso 1 1 calc R . . H25C H 1.4473 0.0375 0.9353 0.082 Uiso 1 1 calc R . . C15 C 0.0942(8) 0.2500 0.0281(6) 0.0443(18) Uani 1 2 d S . . H15A H 0.1807 0.2500 -0.0005 0.066 Uiso 1 2 calc SR . . H15B H 0.0499 0.2882 -0.0011 0.066 Uiso 0.50 1 calc PR . . H15C H 0.0499 0.2118 -0.0011 0.066 Uiso 0.50 1 calc PR . . C16 C 0.035(2) 0.1921(8) 0.2146(11) 0.090(6) Uani 0.50 1 d P . . C16A C 0.176(2) 0.1934(9) 0.2060(11) 0.084(6) Uani 0.50 1 d P . . C17 C 0.2301(16) 0.2500 0.1969(17) 0.077(7) Uani 0.50 2 d SP . . C17A C -0.0320(19) 0.2500 0.197(2) 0.082(7) Uani 0.50 2 d SP . . C18 C 0.5703(9) 0.2500 0.3544(8) 0.104(5) Uani 1 2 d S . . H27A H 0.4796 0.2500 0.3692 0.156 Uiso 1 2 calc SR . . H27B H 0.5919 0.2118 0.3091 0.156 Uiso 0.50 1 calc PR . . H27C H 0.5919 0.2882 0.3091 0.156 Uiso 0.50 1 calc PR . . C19 C 0.7814(7) 0.2500 0.4524(9) 0.066(3) Uani 1 2 d S . . H26A H 0.8255 0.2500 0.5301 0.099 Uiso 1 2 calc SR . . H26B H 0.8051 0.2882 0.4080 0.099 Uiso 0.50 1 calc PR . . H26C H 0.8051 0.2118 0.4080 0.099 Uiso 0.50 1 calc PR . . C20 C 0.6077(17) 0.1989(7) 0.5401(15) 0.172(6) Uiso 1 1 d . . . H6A H 0.5162 0.1994 0.5498 0.258 Uiso 1 1 calc R . . H6B H 0.6505 0.2025 0.6182 0.258 Uiso 1 1 calc R . . H6C H 0.6323 0.1589 0.5022 0.258 Uiso 1 1 calc R . . C21 C 0.3609(11) 0.0637(5) 0.3219(10) 0.108(3) Uiso 1 1 d . . . H4A H 0.4301 0.0352 0.2979 0.130 Uiso 1 1 calc R . . H4B H 0.2970 0.0659 0.2562 0.130 Uiso 1 1 calc R . . C22 C 0.3018(14) 0.0394(7) 0.4347(14) 0.153(5) Uiso 1 1 d . . . H7A H 0.2721 -0.0044 0.4224 0.229 Uiso 1 1 calc R . . H7B H 0.2305 0.0668 0.4546 0.229 Uiso 1 1 calc R . . H7C H 0.3649 0.0403 0.5000 0.229 Uiso 1 1 calc R . . C23 C -0.1846(8) 0.0318(5) 0.2651(8) 0.089(3) Uani 1 1 d . . . H5A H -0.2385 0.0070 0.3187 0.106 Uiso 1 1 calc R . . H5B H -0.1482 0.0014 0.2082 0.106 Uiso 1 1 calc R . . 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 Cl1 0.182(3) 0.0772(17) 0.1043(19) -0.0178(13) -0.057(2) 0.0050(16) S1 0.0252(7) 0.0385(9) 0.0153(6) 0.000 -0.0003(5) 0.000 O1 0.029(3) 0.171(7) 0.023(2) 0.000 -0.011(2) 0.000 N1 0.0237(17) 0.0193(17) 0.0369(19) 0.0074(14) 0.0038(14) 0.0009(13) C1 0.026(2) 0.023(2) 0.039(2) 0.0102(17) 0.0017(17) 0.0043(16) Cl2 0.158(3) 0.134(3) 0.263(5) -0.048(3) -0.092(3) 0.074(2) O2 0.092(3) 0.074(3) 0.0343(19) -0.0148(19) -0.003(2) 0.035(3) N2 0.021(2) 0.029(3) 0.023(2) 0.000 0.0019(17) 0.000 C2 0.042(3) 0.028(2) 0.045(3) 0.013(2) 0.003(2) 0.0028(19) O3 0.026(2) 0.038(2) 0.0170(18) 0.000 -0.0011(15) 0.000 N3 0.025(2) 0.023(2) 0.021(2) 0.000 -0.0037(18) 0.000 C3 0.035(2) 0.019(2) 0.051(3) 0.0075(19) 0.016(2) -0.0025(17) N4 0.036(3) 0.035(3) 0.021(2) 0.000 0.002(2) 0.000 C4 0.027(2) 0.019(2) 0.040(2) -0.0015(17) 0.0076(17) -0.0016(15) N5 0.024(3) 0.248(13) 0.021(3) 0.000 -0.001(2) 0.000 C5 0.025(2) 0.028(2) 0.045(3) -0.0104(19) 0.0026(18) -0.0081(17) C6 0.0188(17) 0.028(2) 0.031(2) -0.0025(17) -0.0045(15) -0.0032(15) C7 0.0216(19) 0.037(3) 0.040(2) 0.0000(19) 0.0013(17) -0.0046(17) C8 0.034(2) 0.064(3) 0.025(2) 0.012(2) -0.0082(18) 0.005(2) C9 0.0189(17) 0.038(2) 0.0256(19) 0.0066(17) -0.0010(15) 0.0061(16) C10 0.0237(19) 0.027(2) 0.045(3) 0.0164(19) 0.0030(18) 0.0063(16) C11 0.037(2) 0.046(3) 0.042(3) -0.018(2) -0.003(2) -0.005(2) C12 0.029(2) 0.031(3) 0.078(4) -0.006(2) 0.009(2) -0.0110(19) C13 0.035(2) 0.025(2) 0.047(3) 0.002(2) 0.011(2) 0.0051(18) C14 0.037(3) 0.048(3) 0.079(4) 0.034(3) 0.000(3) 0.019(2) C15 0.069(5) 0.044(4) 0.019(3) 0.000 -0.005(3) 0.000 C16 0.154(17) 0.088(11) 0.030(6) 0.010(6) 0.023(8) -0.069(12) C16A 0.123(15) 0.100(12) 0.028(5) 0.004(7) 0.000(7) 0.062(11) C17 0.034(8) 0.15(3) 0.045(10) 0.000 0.002(7) 0.000 C17A 0.052(11) 0.102(19) 0.095(17) 0.000 0.035(11) 0.000 C18 0.051(5) 0.232(16) 0.027(4) 0.000 -0.019(4) 0.000 C19 0.026(4) 0.115(9) 0.057(5) 0.000 0.008(3) 0.000 C23 0.083(5) 0.102(7) 0.081(5) 0.011(5) 0.006(4) 0.025(5) _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 Cl1 C23 1.648(9) . ? S1 O1 1.435(5) . ? S1 O2 1.450(4) 4_565 ? S1 O2 1.450(4) . ? S1 O3 1.509(4) . ? N1 C4 1.379(5) . ? N1 C1 1.395(5) . ? C1 C2 1.370(6) . ? C1 C10 1.510(6) . ? Cl2 C23 1.703(9) . ? N2 C6 1.372(5) . ? N2 C6 1.372(5) 4_565 ? C2 C3 1.417(7) . ? N3 C9 1.367(5) 4_565 ? N3 C9 1.367(5) . ? C3 C4 1.369(7) . ? O4 C21 1.308(14) . ? N4 C17A 1.440(19) . ? N4 C17 1.450(18) . ? N4 C15 1.505(7) . ? N4 C16 1.515(13) 4_565 ? N4 C16 1.515(13) . ? N4 C16A 1.524(14) 4_565 ? N4 C16A 1.524(13) . ? C4 C5 1.514(6) . ? N5 C20 1.389(16) . ? N5 C20 1.389(16) 4_565 ? N5 C18 1.483(10) . ? N5 C19 1.495(10) . ? C5 C6 1.523(6) . ? C5 C12 1.541(6) . ? C5 C11 1.546(7) . ? C6 C7 1.364(6) . ? C7 C7 1.426(10) 4_565 ? C8 C9 1.363(6) . ? C8 C8 1.382(11) 4_565 ? C9 C10 1.525(7) . ? C10 C14 1.541(6) . ? C10 C13 1.553(7) . ? C16 C17A 1.42(2) . ? C16 C16A 1.50(3) . ? C16A C17 1.33(2) . ? C17 C16A 1.33(2) 4_565 ? C17A C16 1.42(2) 4_565 ? C21 C22 1.519(18) . ? 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 O1 S1 O2 112.1(2) . 4_565 ? O1 S1 O2 112.1(2) . . ? O2 S1 O2 106.0(5) 4_565 . ? O1 S1 O3 109.0(3) . . ? O2 S1 O3 108.76(19) 4_565 . ? O2 S1 O3 108.76(19) . . ? C4 N1 C1 109.6(4) . . ? C2 C1 N1 106.9(4) . . ? C2 C1 C10 130.8(4) . . ? N1 C1 C10 122.3(4) . . ? C6 N2 C6 110.8(5) . 4_565 ? C1 C2 C3 108.1(4) . . ? C9 N3 C9 110.3(5) 4_565 . ? C4 C3 C2 108.0(4) . . ? C17A N4 C17 148.1(14) . . ? C17A N4 C15 106.4(12) . . ? C17 N4 C15 105.5(9) . . ? C17A N4 C16 57.2(10) . 4_565 ? C17 N4 C16 109.1(10) . 4_565 ? C15 N4 C16 113.2(6) . 4_565 ? C17A N4 C16 57.2(10) . . ? C17 N4 C16 109.1(10) . . ? C15 N4 C16 113.2(6) . . ? C16 N4 C16 106.6(16) 4_565 . ? C17A N4 C16A 115.1(10) . 4_565 ? C17 N4 C16A 52.9(9) . 4_565 ? C15 N4 C16A 108.8(6) . 4_565 ? C16 N4 C16A 59.3(11) 4_565 4_565 ? C16 N4 C16A 137.6(8) . 4_565 ? C17A N4 C16A 115.1(10) . . ? C17 N4 C16A 52.9(9) . . ? C15 N4 C16A 108.8(6) . . ? C16 N4 C16A 137.6(8) 4_565 . ? C16 N4 C16A 59.3(11) . . ? C16A N4 C16A 102.4(17) 4_565 . ? C3 C4 N1 107.4(4) . . ? C3 C4 C5 130.8(4) . . ? N1 C4 C5 121.7(4) . . ? C20 N5 C20 100.9(15) . 4_565 ? C20 N5 C18 111.3(8) . . ? C20 N5 C18 111.3(8) 4_565 . ? C20 N5 C19 110.5(8) . . ? C20 N5 C19 110.5(8) 4_565 . ? C18 N5 C19 111.9(7) . . ? C4 C5 C6 110.9(3) . . ? C4 C5 C12 107.7(4) . . ? C6 C5 C12 108.2(4) . . ? C4 C5 C11 110.6(4) . . ? C6 C5 C11 109.7(4) . . ? C12 C5 C11 109.6(4) . . ? C7 C6 N2 106.8(4) . . ? C7 C6 C5 130.1(4) . . ? N2 C6 C5 123.0(4) . . ? C6 C7 C7 107.8(3) . 4_565 ? C9 C8 C8 108.4(3) . 4_565 ? C8 C9 N3 106.4(4) . . ? C8 C9 C10 131.3(4) . . ? N3 C9 C10 122.3(4) . . ? C1 C10 C9 110.9(4) . . ? C1 C10 C14 108.7(4) . . ? C9 C10 C14 109.2(4) . . ? C1 C10 C13 110.5(4) . . ? C9 C10 C13 109.6(3) . . ? C14 C10 C13 107.8(4) . . ? C17A C16 C16A 118.0(14) . . ? C17A C16 N4 58.8(10) . . ? C16A C16 N4 60.7(9) . . ? C17 C16A C16 117.2(14) . . ? C17 C16A N4 60.7(10) . . ? C16 C16A N4 60.1(9) . . ? C16A C17 C16A 127(2) . 4_565 ? C16A C17 N4 66.4(10) . . ? C16A C17 N4 66.4(10) 4_565 . ? C16 C17A C16 118(2) 4_565 . ? C16 C17A N4 64.1(10) 4_565 . ? C16 C17A N4 64.1(10) . . ? O4 C21 C22 105.8(11) . . ? Cl1 C23 Cl2 116.7(6) . . ? _diffrn_measured_fraction_theta_max 0.994 _diffrn_reflns_theta_full 28.32 _diffrn_measured_fraction_theta_full 0.994 _refine_diff_density_max 2.415 _refine_diff_density_min -1.352 _refine_diff_density_rms 0.168