#------------------------------------------------------------------------------ #$Date: 2016-02-16 20:30:59 +0000 (Tue, 16 Feb 2016) $ #$Revision: 176467 $ #$URL: svn://www.crystallography.net/cod/cif/4/30/85/4308543.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/ # # All data on this site have been placed in the public domain by the # contributors. # data_4308543 loop_ _publ_author_name 'Nancy L. S. Yue' 'Michael C. Jennings' 'Richard J. Puddephatt' _publ_section_title ; Disilver(I) Macrocycles: Variation of Cavity Size with Anion Binding ; _journal_name_full 'Inorganic Chemistry' _journal_page_first 1125 _journal_page_last 1131 _journal_paper_doi 10.1021/ic048549c _journal_volume 44 _journal_year 2005 _chemical_formula_sum 'C42.5 H41 Ag2 B2 Cl5 F8 N8 O4' _chemical_formula_weight 1294.44 _chemical_name_systematic ; ? ; _space_group_IT_number 13 _symmetry_cell_setting monoclinic _symmetry_space_group_name_Hall '-P 2yc' _symmetry_space_group_name_H-M 'P 1 2/c 1' _atom_sites_solution_hydrogens geom _atom_sites_solution_primary Patterson _atom_sites_solution_secondary difmap _audit_creation_method SHELXL-97 _cell_angle_alpha 90.00 _cell_angle_beta 113.4290(10) _cell_angle_gamma 90.00 _cell_formula_units_Z 2 _cell_length_a 16.9602(3) _cell_length_b 9.5276(2) _cell_length_c 17.7105(4) _cell_measurement_temperature 150(2) _cell_volume 2625.89(10) _computing_cell_refinement 'Nonius DENZO' _computing_data_collection 'Nonius COLLECT' _computing_data_reduction 'Nonius DENZO' _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 150(2) _diffrn_measured_fraction_theta_full 0.998 _diffrn_measured_fraction_theta_max 0.998 _diffrn_measurement_device_type 'Nonius Kappa-CCD' _diffrn_measurement_method 'phi/omega 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 0.068 _diffrn_reflns_av_sigmaI/netI 0.0493 _diffrn_reflns_limit_h_max 20 _diffrn_reflns_limit_h_min -20 _diffrn_reflns_limit_k_max 10 _diffrn_reflns_limit_k_min -11 _diffrn_reflns_limit_l_max 20 _diffrn_reflns_limit_l_min -21 _diffrn_reflns_number 25633 _diffrn_reflns_theta_full 25.00 _diffrn_reflns_theta_max 25.00 _diffrn_reflns_theta_min 2.56 _exptl_absorpt_coefficient_mu 1.077 _exptl_absorpt_correction_T_max 0.9112 _exptl_absorpt_correction_T_min 0.5195 _exptl_absorpt_correction_type integration _exptl_crystal_colour colourless _exptl_crystal_density_diffrn 1.637 _exptl_crystal_density_method 'not measured' _exptl_crystal_description plate _exptl_crystal_F_000 1290 _exptl_crystal_size_max 0.70 _exptl_crystal_size_mid 0.56 _exptl_crystal_size_min 0.09 _refine_diff_density_max 1.226 _refine_diff_density_min -0.719 _refine_diff_density_rms 0.102 _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.050 _refine_ls_hydrogen_treatment mixed _refine_ls_matrix_type full _refine_ls_number_parameters 397 _refine_ls_number_reflns 4623 _refine_ls_number_restraints 17 _refine_ls_restrained_S_all 1.052 _refine_ls_R_factor_all 0.0678 _refine_ls_R_factor_gt 0.0473 _refine_ls_shift/su_max 0.001 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0786P)^2^+2.5556P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.1271 _refine_ls_wR_factor_ref 0.1386 _reflns_number_gt 3479 _reflns_number_total 4623 _reflns_threshold_expression >2sigma(I) _cod_data_source_file ic048549csi20041015_044205_4.cif _cod_data_source_block 2d _cod_depositor_comments ; The following automatic conversions were performed: '_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29. Automatic conversion script Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius ; _cod_original_cell_volume 2625.89(9) _cod_original_formula_sum 'C42.50 H41 Ag2 B2 Cl5 F8 N8 O4' _cod_database_code 4308543 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x, y, -z+1/2' '-x, -y, -z' 'x, -y, z-1/2' 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 Ag Ag 0.50452(2) 2.70431(4) 1.62051(2) 0.03858(17) Uani 1 1 d . . . N11 N 0.5876(2) 2.8086(4) 1.7295(2) 0.0335(9) Uani 1 1 d . . . C12 C 0.6406(3) 2.7379(5) 1.7962(3) 0.0335(11) Uani 1 1 d . . . H12A H 0.6408 2.6383 1.7942 0.040 Uiso 1 1 calc R . . C13 C 0.6939(3) 2.8034(5) 1.8665(3) 0.0364(11) Uani 1 1 d . . . H13A H 0.7304 2.7497 1.9123 0.044 Uiso 1 1 calc R . . C14 C 0.6945(3) 2.9492(5) 1.8709(3) 0.0317(10) Uani 1 1 d . . . C15 C 0.6389(3) 3.0215(5) 1.8031(3) 0.0337(11) Uani 1 1 d . . . H15A H 0.6360 3.1210 1.8043 0.040 Uiso 1 1 calc R . . C16 C 0.5879(3) 2.9491(5) 1.7342(3) 0.0338(11) Uani 1 1 d . . . H16A H 0.5511 3.0007 1.6876 0.041 Uiso 1 1 calc R . . N17 N 0.7497(3) 3.0183(4) 1.9435(2) 0.0377(10) Uani 1 1 d . . . C18 C 0.7554(5) 2.9626(7) 2.0236(3) 0.072(2) Uani 1 1 d . . . H18A H 0.7950 3.0207 2.0682 0.108 Uiso 1 1 calc R . . H18B H 0.7766 2.8658 2.0302 0.108 Uiso 1 1 calc R . . H18C H 0.6984 2.9644 2.0253 0.108 Uiso 1 1 calc R . . C19 C 0.7905(3) 3.1426(5) 1.9446(3) 0.0314(10) Uani 1 1 d . . . O20 O 0.8221(2) 3.2111(3) 2.0083(2) 0.0401(8) Uani 1 1 d . . . N21 N 0.4179(2) 2.5996(4) 1.5138(2) 0.0331(9) Uani 1 1 d . . . C22 C 0.3642(3) 2.5000(5) 1.5185(3) 0.0391(12) Uani 1 1 d . . . H22A H 0.3677 2.4733 1.5714 0.047 Uiso 1 1 calc R . . C23 C 0.3046(3) 2.4348(5) 1.4509(3) 0.0380(12) Uani 1 1 d . . . H23A H 0.2671 2.3661 1.4573 0.046 Uiso 1 1 calc R . . C24 C 0.2993(3) 2.4700(5) 1.3730(3) 0.0290(10) Uani 1 1 d . . . C25 C 0.3561(3) 2.5692(5) 1.3675(3) 0.0304(10) Uani 1 1 d . . . H25A H 0.3561 2.5940 1.3155 0.036 Uiso 1 1 calc R . . C26 C 0.4130(3) 2.6318(5) 1.4384(3) 0.0336(11) Uani 1 1 d . . . H26A H 0.4507 2.7016 1.4336 0.040 Uiso 1 1 calc R . . N27 N 0.2404(2) 2.3992(4) 1.3035(2) 0.0326(9) Uani 1 1 d . . . C28 C 0.2264(3) 2.2480(6) 1.3132(3) 0.0428(13) Uani 1 1 d . . . H28A H 0.1840 2.2109 1.2613 0.064 Uiso 1 1 calc R . . H28B H 0.2053 2.2357 1.3569 0.064 Uiso 1 1 calc R . . H28C H 0.2808 2.1973 1.3278 0.064 Uiso 1 1 calc R . . C29 C 0.1995(3) 2.4562(5) 1.2264(3) 0.0328(11) Uani 1 1 d . . . O30 O 0.1635(2) 2.3813(4) 1.16662(19) 0.0411(8) Uani 1 1 d . . . C31 C 0.8005(3) 3.1918(5) 1.8687(3) 0.0320(11) Uani 1 1 d . . . C32 C 0.7928(3) 3.3338(5) 1.8519(3) 0.0304(10) Uani 1 1 d . . . H32A H 0.7794 3.3956 1.8872 0.036 Uiso 1 1 calc R . . C33 C 0.8044(3) 3.3878(5) 1.7842(3) 0.0325(11) Uani 1 1 d . . . C34 C 0.8283(3) 3.2978(5) 1.7346(3) 0.0375(12) Uani 1 1 d . . . H34A H 0.8364 3.3334 1.6881 0.045 Uiso 1 1 calc R . . C35 C 0.8401(3) 3.1565(6) 1.7538(3) 0.0414(12) Uani 1 1 d . . . H35A H 0.8582 3.0959 1.7212 0.050 Uiso 1 1 calc R . . C36 C 0.8261(3) 3.1023(5) 1.8197(3) 0.0371(11) Uani 1 1 d . . . H36A H 0.8337 3.0048 1.8318 0.044 Uiso 1 1 calc R . . B40 B 0.5577(9) 2.9774(16) 1.5184(8) 0.067(5) Uani 0.50 1 d PD A -1 F41 F 0.4816(5) 2.9923(19) 1.5212(10) 0.143(6) Uani 0.50 1 d PD A -1 F42 F 0.5779(5) 2.8396(8) 1.5203(5) 0.084(3) Uani 0.50 1 d PD A -1 F43 F 0.6094(6) 3.0480(8) 1.5836(4) 0.083(2) Uani 0.50 1 d PD A -1 F44 F 0.5560(6) 3.0420(8) 1.4497(4) 0.068(2) Uani 0.50 1 d PD A -1 B50 B 0.4917(12) 3.3531(10) 1.7474(19) 0.032(3) Uani 0.50 1 d PD B -1 F51 F 0.5185(12) 3.267(3) 1.6982(12) 0.037(3) Uani 0.50 1 d PD B -1 F52 F 0.4057(4) 3.3884(7) 1.7075(4) 0.0476(15) Uani 0.50 1 d PD B -1 F53 F 0.5392(5) 3.4752(8) 1.7680(5) 0.073(2) Uani 0.50 1 d PD B -1 F54 F 0.5058(12) 3.283(3) 1.8210(13) 0.043(4) Uani 0.50 1 d PD B -1 C71 C 0.9874(8) 2.7294(14) 1.6749(9) 0.068(4) Uani 0.50 1 d PD C 1 H71A H 1.0331 2.7191 1.6538 0.082 Uiso 0.50 1 calc PR C 1 H71B H 0.9313 2.7173 1.6280 0.082 Uiso 0.50 1 calc PR C 1 Cl72 Cl 1.0000 2.5965(3) 1.7500 0.0709(6) Uani 1 2 d SD . 1 Cl73 Cl 0.9927(3) 2.8938(4) 1.7154(3) 0.101(2) Uani 0.50 1 d PD . 1 C81 C 0.9669(7) 2.6569(16) 2.0387(16) 0.113(9) Uani 0.50 1 d PD D 2 H81A H 0.9797 2.6029 1.9971 0.136 Uiso 0.50 1 calc PR D 2 H81B H 1.0169 2.6470 2.0919 0.136 Uiso 0.50 1 calc PR D 2 Cl82 Cl 0.8849(3) 2.5876(4) 2.0477(2) 0.0659(9) Uani 0.50 1 d PD D 2 Cl83 Cl 0.9562(3) 2.8386(7) 2.0096(4) 0.115(2) Uani 0.50 1 d PD D 2 C91 C 0.9734(16) 2.705(2) 2.0125(13) 0.029(5) Uiso 0.25 1 d PD E 3 H91A H 0.9492 2.6617 1.9572 0.035 Uiso 0.25 1 calc PR E 3 H91B H 1.0354 2.6814 2.0361 0.035 Uiso 0.25 1 calc PR E 3 Cl92 Cl 0.9331(10) 2.6179(15) 2.0663(8) 0.112(4) Uiso 0.25 1 d PD E 3 Cl93 Cl 0.9689(6) 2.8841(11) 1.9951(6) 0.073(3) Uiso 0.25 1 d PD . 3 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 Ag 0.0395(2) 0.0423(3) 0.0301(2) -0.00721(17) 0.00974(17) -0.00563(17) N11 0.035(2) 0.036(2) 0.029(2) -0.0038(18) 0.0120(18) -0.0043(17) C12 0.041(3) 0.029(3) 0.033(3) -0.002(2) 0.017(2) 0.001(2) C13 0.046(3) 0.032(3) 0.027(3) 0.009(2) 0.011(2) 0.006(2) C14 0.041(3) 0.031(3) 0.026(2) -0.003(2) 0.016(2) 0.000(2) C15 0.035(2) 0.031(3) 0.035(3) 0.001(2) 0.014(2) 0.004(2) C16 0.035(3) 0.037(3) 0.028(3) 0.001(2) 0.011(2) 0.001(2) N17 0.060(3) 0.031(2) 0.0159(19) -0.0005(17) 0.0087(18) 0.0025(19) C18 0.131(6) 0.050(4) 0.029(3) 0.002(3) 0.027(4) -0.010(4) C19 0.037(3) 0.031(3) 0.024(2) -0.005(2) 0.010(2) 0.005(2) O20 0.050(2) 0.039(2) 0.0267(18) -0.0087(15) 0.0107(16) 0.0001(16) N21 0.038(2) 0.034(2) 0.027(2) -0.0014(17) 0.0121(17) 0.0002(18) C22 0.050(3) 0.041(3) 0.025(3) 0.002(2) 0.014(2) -0.008(2) C23 0.047(3) 0.035(3) 0.033(3) 0.002(2) 0.018(2) -0.009(2) C24 0.033(2) 0.029(3) 0.026(2) -0.003(2) 0.014(2) 0.000(2) C25 0.030(2) 0.035(3) 0.026(2) 0.001(2) 0.0116(19) -0.0028(19) C26 0.035(2) 0.033(3) 0.036(3) 0.001(2) 0.017(2) -0.002(2) N27 0.039(2) 0.032(2) 0.026(2) -0.0025(17) 0.0121(17) -0.0072(17) C28 0.056(3) 0.037(3) 0.036(3) -0.003(2) 0.020(3) -0.015(2) C29 0.030(2) 0.039(3) 0.031(3) -0.004(2) 0.014(2) -0.004(2) O30 0.049(2) 0.043(2) 0.0272(18) -0.0081(16) 0.0112(15) -0.0107(17) C31 0.029(2) 0.036(3) 0.024(2) -0.006(2) 0.0029(19) 0.001(2) C32 0.032(2) 0.036(3) 0.020(2) -0.006(2) 0.0078(19) 0.003(2) C33 0.028(2) 0.037(3) 0.028(2) -0.006(2) 0.0076(19) 0.002(2) C34 0.042(3) 0.048(3) 0.026(2) -0.005(2) 0.017(2) 0.003(2) C35 0.047(3) 0.045(3) 0.035(3) -0.008(2) 0.020(2) 0.010(2) C36 0.038(3) 0.037(3) 0.035(3) -0.007(2) 0.013(2) 0.006(2) B40 0.041(9) 0.105(16) 0.046(10) -0.001(10) 0.009(8) -0.002(10) F41 0.038(7) 0.242(16) 0.151(14) 0.024(12) 0.038(6) -0.010(8) F42 0.096(6) 0.050(5) 0.074(5) 0.015(4) 0.002(4) -0.025(4) F43 0.144(7) 0.070(5) 0.050(4) -0.022(4) 0.057(5) -0.034(5) F44 0.079(6) 0.058(5) 0.043(4) 0.018(3) -0.001(4) -0.016(4) B50 0.044(8) 0.029(4) 0.028(6) -0.013(12) 0.021(6) -0.010(9) F51 0.047(9) 0.040(5) 0.026(8) 0.009(6) 0.016(6) 0.015(6) F52 0.051(4) 0.056(4) 0.040(3) 0.014(3) 0.021(3) 0.017(3) F53 0.096(6) 0.051(4) 0.078(6) -0.024(4) 0.040(6) -0.036(4) F54 0.050(10) 0.044(9) 0.031(9) 0.000(6) 0.013(7) -0.001(7) C71 0.044(7) 0.089(10) 0.076(9) 0.030(8) 0.028(7) 0.028(7) Cl72 0.0680(14) 0.0678(16) 0.0845(17) 0.000 0.0383(13) 0.000 Cl73 0.049(2) 0.060(2) 0.174(6) -0.003(2) 0.023(4) -0.0048(19) C81 0.001(5) 0.070(11) 0.22(2) 0.029(14) -0.011(9) 0.000(6) Cl82 0.083(3) 0.075(2) 0.0398(17) -0.0014(15) 0.0242(17) -0.009(2) Cl83 0.057(3) 0.126(5) 0.129(5) 0.038(4) 0.003(2) -0.030(3) 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' B B 0.0013 0.0007 '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' F F 0.0171 0.0103 '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' Cl Cl 0.1484 0.1585 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 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 N21 Ag N11 177.73(14) . . ? C16 N11 C12 117.4(4) . . ? C16 N11 Ag 120.5(3) . . ? C12 N11 Ag 122.1(3) . . ? N11 C12 C13 122.8(4) . . ? C12 C13 C14 119.6(4) . . ? C15 C14 C13 117.6(4) . . ? C15 C14 N17 122.3(4) . . ? C13 C14 N17 120.1(4) . . ? C16 C15 C14 119.6(5) . . ? N11 C16 C15 123.0(4) . . ? C19 N17 C14 124.2(4) . . ? C19 N17 C18 117.2(4) . . ? C14 N17 C18 118.1(4) . . ? O20 C19 N17 120.4(4) . . ? O20 C19 C31 119.8(4) . . ? N17 C19 C31 119.8(4) . . ? C26 N21 C22 116.7(4) . . ? C26 N21 Ag 121.7(3) . . ? C22 N21 Ag 121.6(3) . . ? N21 C22 C23 123.4(4) . . ? C22 C23 C24 119.4(4) . . ? C25 C24 C23 117.7(4) . . ? C25 C24 N27 122.5(4) . . ? C23 C24 N27 119.7(4) . . ? C26 C25 C24 119.1(4) . . ? N21 C26 C25 123.6(4) . . ? C29 N27 C24 125.5(4) . . ? C29 N27 C28 117.4(4) . . ? C24 N27 C28 117.0(4) . . ? O30 C29 N27 120.8(4) . . ? O30 C29 C33 119.3(4) . . ? N27 C29 C33 119.9(4) . . ? C32 C31 C36 119.3(4) . . ? C32 C31 C19 117.8(4) . . ? C36 C31 C19 122.6(4) . . ? C31 C32 C33 121.0(4) . . ? C32 C33 C34 119.4(5) . . ? C32 C33 C29 117.6(4) . . ? C34 C33 C29 122.6(4) . . ? C35 C34 C33 119.5(5) . . ? C36 C35 C34 121.0(4) . . ? C35 C36 C31 119.6(5) . . ? F41 B40 F43 103.4(11) . . ? F41 B40 F44 108.3(16) . . ? F43 B40 F44 108.9(11) . . ? F41 B40 F42 110.2(13) . . ? F43 B40 F42 113.4(11) . . ? F44 B40 F42 112.2(11) . . ? F53 B50 F52 108.4(10) . . ? F53 B50 F54 107(2) . . ? F52 B50 F54 110(2) . . ? F53 B50 F51 111(2) . . ? F52 B50 F51 111.3(18) . . ? F54 B50 F51 108.9(10) . . ? Cl73 C71 Cl72 111.4(8) . . ? C71 Cl72 C71 89.8(10) . . ? Cl73 Cl73 C71 113.6(5) . . ? Cl82 C81 Cl83 115.6(8) . . ? Cl92 C91 Cl93 128.1(15) . . ? C91 Cl93 Cl93 154.0(12) . . ? 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 Ag N21 2.125(4) . ? Ag N11 2.129(4) . ? N11 C16 1.341(6) . ? N11 C12 1.346(6) . ? C12 C13 1.365(7) . ? C13 C14 1.392(6) . ? C14 C15 1.380(6) . ? C14 N17 1.417(6) . ? C15 C16 1.369(7) . ? N17 C19 1.368(6) . ? N17 C18 1.480(6) . ? C19 O20 1.227(5) . ? C19 C31 1.496(7) . ? N21 C26 1.340(6) . ? N21 C22 1.340(6) . ? C22 C23 1.371(7) . ? C23 C24 1.387(6) . ? C24 C25 1.381(6) . ? C24 N27 1.412(6) . ? C25 C26 1.379(6) . ? N27 C29 1.373(6) . ? N27 C28 1.481(6) . ? C29 O30 1.221(5) . ? C29 C33 1.496(7) . ? C31 C32 1.380(6) . ? C31 C36 1.402(6) . ? C32 C33 1.388(6) . ? C33 C34 1.398(6) . ? C33 C29 1.496(7) . ? C34 C35 1.383(7) . ? C35 C36 1.381(7) . ? B40 F41 1.318(14) . ? B40 F43 1.322(13) . ? B40 F44 1.353(15) . ? B40 F42 1.354(14) . ? B50 F53 1.379(13) . ? B50 F52 1.387(18) . ? B50 F54 1.397(17) . ? B50 F51 1.399(16) . ? C71 Cl73 1.711(15) . ? C71 Cl72 1.787(12) . ? Cl72 C71 1.787(12) . ? Cl73 Cl73 1.149(10) . ? C81 Cl82 1.604(16) . ? C81 Cl83 1.794(16) . ? C91 Cl92 1.61(2) . ? C91 Cl93 1.73(2) . ? Cl93 Cl93 2.42(2) . ?