#------------------------------------------------------------------------------ #$Date: 2025-08-19 11:43:10 +0100 (Tue, 19 Aug 2025) $ #$Revision: 301803 $ #$URL: svn://www.crystallography.net/cod/cif/2/20/51/2205140.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/. The original data for this entry # were provided by IUCr Journals, http://journals.iucr.org/. # # The file may be used within the scientific community so long as # proper attribution is given to the journal article from which the # data were obtained. # data_2205140 loop_ _publ_author_name 'Hussain, Zakir' 'Oeser, Thomas' 'Hopf, Henning' _publ_section_title ; Ethyl 1,3-dibromoazulene-6-carboxylate ; _journal_issue 2 _journal_name_full 'Acta Crystallographica Section E' _journal_page_first o478 _journal_page_last o479 _journal_paper_doi 10.1107/S1600536805001972 _journal_volume 61 _journal_year 2005 _chemical_formula_iupac 'C13 H10 Br2 O2' _chemical_formula_moiety 'C13 H10 Br2 O2' _chemical_formula_sum 'C13 H10 Br2 O2' _chemical_formula_weight 358.03 _chemical_name_systematic ; Ethyl 1,3-dibromoazulene-6-carboxylate ; _space_group_IT_number 29 _symmetry_cell_setting orthorhombic _symmetry_space_group_name_Hall 'P 2c -2ac' _symmetry_space_group_name_H-M 'P c a 21' _atom_sites_solution_hydrogens geom _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _audit_creation_method SHELXL-97 _cell_angle_alpha 90.0 _cell_angle_beta 90.0 _cell_angle_gamma 90.0 _cell_formula_units_Z 8 _cell_length_a 17.032(2) _cell_length_b 3.9694(5) _cell_length_c 35.819(5) _cell_measurement_reflns_used 12806 _cell_measurement_temperature 95(2) _cell_measurement_theta_max 28.29 _cell_measurement_theta_min 2.46 _cell_volume 2421.6(5) _computing_cell_refinement SMART _computing_data_collection 'SMART (Bruker, 2001)' _computing_data_reduction 'SAINT (Bruker, 2001)' _computing_molecular_graphics 'ORTEP-3 (Farrugia, 1997)' _computing_publication_material SHELXTL _computing_structure_refinement SHELXTL _computing_structure_solution 'SHELXTL (Bruker, 2001)' _diffrn_ambient_temperature 95(2) _diffrn_measured_fraction_theta_full 0.996 _diffrn_measured_fraction_theta_max 0.996 _diffrn_measurement_device_type 'Bruker Smart APEX CCD area-detector' _diffrn_measurement_method '\f and \w' _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 0.039 _diffrn_reflns_av_sigmaI/netI 0.046 _diffrn_reflns_limit_h_max 13 _diffrn_reflns_limit_h_min -22 _diffrn_reflns_limit_k_max 5 _diffrn_reflns_limit_k_min -5 _diffrn_reflns_limit_l_max 47 _diffrn_reflns_limit_l_min -47 _diffrn_reflns_number 15805 _diffrn_reflns_theta_full 28.30 _diffrn_reflns_theta_max 28.30 _diffrn_reflns_theta_min 2.27 _exptl_absorpt_coefficient_mu 6.680 _exptl_absorpt_correction_T_max 0.6170 _exptl_absorpt_correction_T_min 0.2657 _exptl_absorpt_correction_type numerical _exptl_absorpt_process_details '(SMART; Bruker, 2001)' _exptl_crystal_colour 'dark green' _exptl_crystal_density_diffrn 1.964 _exptl_crystal_density_method 'not measured' _exptl_crystal_description needle _exptl_crystal_F_000 1392 _exptl_crystal_size_max 0.27 _exptl_crystal_size_mid 0.08 _exptl_crystal_size_min 0.08 _refine_diff_density_max 1.013 _refine_diff_density_min -1.591 _refine_ls_abs_structure_details 'Flack (1983), 2880 Friedel pairs' _refine_ls_abs_structure_Flack 0.141(13) _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.111 _refine_ls_hydrogen_treatment constr _refine_ls_matrix_type full _refine_ls_number_parameters 310 _refine_ls_number_reflns 5943 _refine_ls_number_restraints 1 _refine_ls_restrained_S_all 1.111 _refine_ls_R_factor_all 0.044 _refine_ls_R_factor_gt 0.042 _refine_ls_shift/su_max 0.002 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w = 1/[\s^2^(Fo^2^)+(0.0295P)^2^+8.7967P] where P = (Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.091 _refine_ls_wR_factor_ref 0.092 _reflns_number_gt 5714 _reflns_number_total 5943 _reflns_threshold_expression I>2\s(I) _cod_data_source_file ob6470.cif _cod_data_source_block I _cod_database_code 2205140 _cod_database_fobs_code 2205140 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x, -y, z+1/2' 'x+1/2, -y, z' '-x+1/2, y, z+1/2' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv _atom_site_adp_type _atom_site_calc_flag _atom_site_refinement_flags _atom_site_occupancy _atom_site_type_symbol Br1 0.47259(3) 0.13298(15) 0.852525(17) 0.02002(12) Uani d . 1 Br Br2 0.77321(3) -0.07110(13) 0.780198(14) 0.01718(11) Uani d . 1 Br O1 0.8739(2) 0.7617(11) 0.95558(11) 0.0193(8) Uani d . 1 O O2 0.7596(2) 0.9149(11) 0.98170(12) 0.0231(9) Uani d . 1 O C1 0.5809(3) 0.1495(16) 0.84250(14) 0.0184(11) Uani d . 1 C C2 0.6169(3) 0.0111(13) 0.81180(15) 0.0155(10) Uani d . 1 C H2 0.5915 -0.1019 0.7918 0.019 Uiso calc R 1 H C3 0.6976(3) 0.0665(13) 0.81533(14) 0.0131(10) Uani d . 1 C C3A 0.7140(3) 0.2356(13) 0.84865(14) 0.0129(9) Uani d . 1 C C4 0.7868(3) 0.3215(14) 0.86236(13) 0.0150(10) Uani d . 1 C H4 0.8297 0.2641 0.8467 0.018 Uiso calc R 1 H C5 0.8074(3) 0.4805(14) 0.89582(16) 0.0174(11) Uani d . 1 C H5 0.8620 0.5076 0.9002 0.021 Uiso calc R 1 H C6 0.7570(3) 0.6053(14) 0.92384(15) 0.0164(10) Uani d . 1 C C7 0.6752(3) 0.6006(13) 0.92544(15) 0.0168(10) Uani d . 1 C H7 0.6527 0.7059 0.9467 0.020 Uiso calc R 1 H C8 0.6222(3) 0.4632(14) 0.90026(14) 0.0145(10) Uani d . 1 C H8 0.5684 0.4894 0.9067 0.017 Uiso calc R 1 H C8A 0.6359(3) 0.2947(13) 0.86730(14) 0.0126(10) Uani d . 1 C C9 0.7956(3) 0.7755(14) 0.95702(15) 0.0176(10) Uani d . 1 C C10 0.9162(3) 0.9324(14) 0.98557(16) 0.0182(11) Uani d . 1 C H10A 0.9091 0.8111 1.0095 0.022 Uiso calc R 1 H H10B 0.8969 1.1660 0.9886 0.022 Uiso calc R 1 H C11 1.0017(4) 0.9321(16) 0.97424(17) 0.0225(12) Uani d . 1 C H11A 1.0067 1.0202 0.9488 0.034 Uiso calc R 1 H H11B 1.0221 0.7014 0.9751 0.034 Uiso calc R 1 H H11C 1.0317 1.0745 0.9914 0.034 Uiso calc R 1 H Br1' 0.76392(3) -0.45833(15) 0.679699(16) 0.02267(13) Uani d . 1 Br Br2' 0.46196(3) -0.51438(14) 0.753743(15) 0.01849(11) Uani d . 1 Br O1' 0.3777(2) 0.3501(10) 0.57823(10) 0.0192(8) Uani d . 1 O O2' 0.4941(2) 0.4232(12) 0.55007(12) 0.0241(9) Uani d . 1 O C1' 0.6567(3) -0.3833(13) 0.68925(15) 0.0148(10) Uani d . 1 C C2' 0.6188(3) -0.5020(13) 0.72134(17) 0.0181(11) Uani d . 1 C H2' 0.6424 -0.6216 0.7414 0.022 Uiso calc R 1 H C3' 0.5391(3) -0.4107(13) 0.71836(15) 0.0153(10) Uani d . 1 C C3A' 0.5262(3) -0.2405(13) 0.68476(14) 0.0157(10) Uani d . 1 C C4' 0.4554(3) -0.1209(14) 0.67154(15) 0.0154(10) Uani d . 1 C H4' 0.4117 -0.1540 0.6876 0.018 Uiso calc R 1 H C5' 0.4388(3) 0.0411(14) 0.63804(16) 0.0164(11) Uani d . 1 C H5' 0.3852 0.0980 0.6343 0.020 Uiso calc R 1 H C6' 0.4898(3) 0.1327(13) 0.60894(15) 0.0150(10) Uani d . 1 C C7' 0.5707(3) 0.0751(15) 0.60603(16) 0.0196(11) Uani d . 1 C H7' 0.5947 0.1559 0.5838 0.024 Uiso calc R 1 H C8' 0.6207(3) -0.0835(14) 0.63101(16) 0.0177(11) Uani d . 1 C H8' 0.6740 -0.0964 0.6234 0.021 Uiso calc R 1 H C8A' 0.6040(3) -0.2261(14) 0.66548(14) 0.0163(11) Uani d . 1 C C9' 0.4557(3) 0.3172(13) 0.57583(15) 0.0160(10) Uani d . 1 C C10' 0.3395(3) 0.5287(15) 0.54780(15) 0.0195(11) Uani d . 1 C H10C 0.3411 0.3917 0.5247 0.023 Uiso calc R 1 H H10D 0.3666 0.7451 0.5430 0.023 Uiso calc R 1 H C11' 0.2562(4) 0.5910(18) 0.55930(17) 0.0268(13) Uani d . 1 C H11D 0.2554 0.7359 0.5815 0.040 Uiso calc R 1 H H11E 0.2308 0.3759 0.5651 0.040 Uiso calc R 1 H H11F 0.2280 0.7021 0.5389 0.040 Uiso calc R 1 H loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Br1 0.0091(2) 0.0247(3) 0.0263(3) -0.0034(2) 0.0022(2) -0.0016(2) Br2 0.0133(2) 0.0188(3) 0.0194(3) 0.0013(2) 0.0025(2) -0.0034(2) O1 0.0145(17) 0.025(2) 0.0183(18) -0.0020(16) -0.0038(14) -0.0037(16) O2 0.0203(19) 0.031(2) 0.018(2) -0.0005(18) 0.0017(16) -0.0058(17) C1 0.012(2) 0.029(3) 0.014(3) 0.000(2) -0.0024(17) 0.000(2) C2 0.017(3) 0.015(3) 0.015(2) -0.004(2) -0.0017(19) 0.0029(18) C3 0.012(2) 0.012(2) 0.015(2) 0.0038(19) 0.0011(18) 0.0005(19) C3A 0.0096(19) 0.016(2) 0.013(2) 0.0015(18) 0.0027(18) 0.0066(18) C4 0.010(2) 0.023(3) 0.012(2) 0.003(2) 0.0012(17) 0.0038(19) C5 0.008(2) 0.018(3) 0.026(3) 0.001(2) 0.000(2) -0.002(2) C6 0.014(2) 0.021(3) 0.014(2) -0.004(2) -0.0021(19) 0.0026(19) C7 0.020(3) 0.015(3) 0.015(2) 0.001(2) 0.002(2) -0.001(2) C8 0.012(2) 0.016(3) 0.015(2) 0.002(2) 0.0026(18) 0.0033(19) C8A 0.011(2) 0.009(2) 0.017(2) 0.0001(19) 0.0010(17) 0.0048(18) C9 0.019(2) 0.015(3) 0.019(3) 0.000(2) 0.000(2) 0.001(2) C10 0.020(3) 0.016(3) 0.019(3) -0.002(2) 0.000(2) -0.008(2) C11 0.022(3) 0.022(3) 0.024(3) -0.005(2) -0.001(2) -0.003(2) Br1' 0.0125(2) 0.0256(3) 0.0300(3) 0.0045(2) 0.0027(2) 0.0011(2) Br2' 0.0155(2) 0.0220(3) 0.0180(2) -0.0043(2) 0.0019(2) 0.0032(2) O1' 0.0181(18) 0.021(2) 0.0182(19) 0.0002(16) -0.0028(15) 0.0051(15) O2' 0.022(2) 0.029(2) 0.021(2) -0.0029(18) 0.0018(17) 0.0027(17) C1' 0.011(2) 0.014(2) 0.020(2) 0.007(2) -0.0007(18) -0.0068(19) C2' 0.014(3) 0.008(2) 0.032(3) -0.001(2) 0.000(2) 0.000(2) C3' 0.010(2) 0.014(2) 0.021(3) -0.001(2) 0.0048(19) 0.000(2) C3A' 0.015(2) 0.014(2) 0.017(2) -0.0013(19) -0.0009(19) -0.0025(19) C4' 0.013(2) 0.016(3) 0.017(2) -0.005(2) 0.0033(18) -0.003(2) C5' 0.013(2) 0.017(3) 0.019(3) 0.001(2) -0.002(2) -0.002(2) C6' 0.018(2) 0.008(2) 0.019(2) 0.000(2) -0.0032(19) -0.0031(19) C7' 0.018(3) 0.024(3) 0.017(3) -0.005(2) 0.001(2) -0.001(2) C8' 0.015(2) 0.014(3) 0.024(3) -0.003(2) 0.003(2) -0.007(2) C8A' 0.014(2) 0.014(3) 0.021(3) -0.004(2) 0.0020(19) -0.0042(19) C9' 0.022(3) 0.011(2) 0.016(2) -0.002(2) -0.0014(19) -0.0007(19) C10' 0.024(3) 0.023(3) 0.012(2) 0.000(2) -0.004(2) 0.003(2) C11' 0.026(3) 0.037(4) 0.017(3) 0.004(3) -0.001(2) 0.007(2) 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' 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' loop_ _geom_angle_atom_site_label_1 _geom_angle_atom_site_label_2 _geom_angle_atom_site_label_3 _geom_angle C9 O1 C10 116.4(4) C2 C1 C8A 111.8(5) C2 C1 Br1 125.2(4) C8A C1 Br1 123.0(4) C1 C2 C3 107.6(5) C1 C2 H2 126.2 C3 C2 H2 126.2 C2 C3 C3A 110.5(4) C2 C3 Br2 124.5(4) C3A C3 Br2 125.0(4) C4 C3A C3 127.2(5) C4 C3A C8A 126.7(5) C3 C3A C8A 106.0(4) C3A C4 C5 130.0(5) C3A C4 H4 115.0 C5 C4 H4 115.0 C4 C5 C6 128.0(5) C4 C5 H5 116.0 C6 C5 H5 116.0 C7 C6 C5 129.2(5) C7 C6 C9 114.0(5) C5 C6 C9 116.8(5) C8 C7 C6 129.0(5) C8 C7 H7 115.5 C6 C7 H7 115.5 C8A C8 C7 129.6(5) C8A C8 H8 115.2 C7 C8 H8 115.2 C8 C8A C1 128.6(5) C8 C8A C3A 127.3(5) C1 C8A C3A 104.1(4) O2 C9 O1 123.6(5) O2 C9 C6 123.8(5) O1 C9 C6 112.6(5) O1 C10 C11 106.1(4) O1 C10 H10A 110.5 C11 C10 H10A 110.5 O1 C10 H10B 110.5 C11 C10 H10B 110.5 H10A C10 H10B 108.7 C10 C11 H11A 109.5 C10 C11 H11B 109.5 H11A C11 H11B 109.5 C10 C11 H11C 109.5 H11A C11 H11C 109.5 H11B C11 H11C 109.5 C9' O1' C10' 116.4(4) C8A' C1' C2' 110.9(5) C8A' C1' Br1' 126.0(4) C2' C1' Br1' 122.9(4) C1' C2' C3' 107.2(5) C1' C2' H2' 126.4 C3' C2' H2' 126.4 C3A' C3' C2' 109.9(5) C3A' C3' Br2' 125.4(4) C2' C3' Br2' 124.6(4) C4' C3A' C3' 126.8(5) C4' C3A' C8A' 127.1(5) C3' C3A' C8A' 106.1(4) C3A' C4' C5' 129.3(5) C3A' C4' H4' 115.4 C5' C4' H4' 115.4 C4' C5' C6' 129.3(5) C4' C5' H5' 115.3 C6' C5' H5' 115.3 C7' C6' C5' 128.4(5) C7' C6' C9' 113.5(5) C5' C6' C9' 118.1(5) C8' C7' C6' 129.1(5) C8' C7' H7' 115.5 C6' C7' H7' 115.5 C7' C8' C8A' 129.4(5) C7' C8' H8' 115.3 C8A' C8' H8' 115.3 C1' C8A' C8' 126.7(5) C1' C8A' C3A' 105.8(5) C8' C8A' C3A' 127.4(5) O2' C9' O1' 123.6(5) O2' C9' C6' 124.2(5) O1' C9' C6' 112.2(4) O1' C10' C11' 107.4(5) O1' C10' H10C 110.2 C11' C10' H10C 110.2 O1' C10' H10D 110.2 C11' C10' H10D 110.2 H10C C10' H10D 108.5 C10' C11' H11D 109.5 C10' C11' H11E 109.5 H11D C11' H11E 109.5 C10' C11' H11F 109.5 H11D C11' H11F 109.5 H11E C11' H11F 109.5 loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance _geom_bond_publ_flag Br1 C1 1.881(5) yes Br2 C3 1.882(5) yes O1 C9 1.336(6) ? O1 C10 1.460(6) ? O2 C9 1.210(7) ? C1 C2 1.374(8) yes C1 C8A 1.413(7) yes C2 C3 1.397(7) yes C2 H2 0.9500 ? C3 C3A 1.398(7) yes C3A C4 1.376(7) yes C3A C8A 1.507(6) yes C4 C5 1.399(8) yes C4 H4 0.9500 ? C5 C6 1.410(8) yes C5 H5 0.9500 ? C6 C7 1.394(7) yes C6 C9 1.517(8) yes C7 C8 1.388(8) yes C7 H7 0.9500 ? C8 C8A 1.377(7) yes C8 H8 0.9500 ? C10 C11 1.512(8) ? C10 H10A 0.9900 ? C10 H10B 0.9900 ? C11 H11A 0.9800 ? C11 H11B 0.9800 ? C11 H11C 0.9800 ? Br1' C1' 1.881(5) yes Br2' C3' 1.871(5) yes O1' C9' 1.338(7) ? O1' C10' 1.454(6) ? O2' C9' 1.206(7) ? C1' C8A' 1.386(7) yes C1' C2' 1.400(8) yes C2' C3' 1.409(7) yes C2' H2' 0.9500 ? C3' C3A' 1.398(8) yes C3A' C4' 1.380(7) yes C3A' C8A' 1.495(7) yes C4' C5' 1.390(8) yes C4' H4' 0.9500 ? C5' C6' 1.405(8) yes C5' H5' 0.9500 ? C6' C7' 1.401(7) yes C6' C9' 1.510(7) yes C7' C8' 1.386(8) yes C7' H7' 0.9500 ? C8' C8A' 1.388(8) yes C8' H8' 0.9500 ? C10' C11' 1.497(8) ? C10' H10C 0.9900 ? C10' H10D 0.9900 ? C11' H11D 0.9800 ? C11' H11E 0.9800 ? C11' H11F 0.9800 ? 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 C8A C1 C2 C3 -0.9(7) Br1 C1 C2 C3 -177.9(4) C1 C2 C3 C3A 1.1(6) C1 C2 C3 Br2 -179.4(4) C2 C3 C3A C4 177.3(5) Br2 C3 C3A C4 -2.3(8) C2 C3 C3A C8A -0.8(6) Br2 C3 C3A C8A 179.6(4) C3 C3A C4 C5 -177.8(5) C8A C3A C4 C5 -0.1(9) C3A C4 C5 C6 -2.5(10) C4 C5 C6 C7 0.4(10) C4 C5 C6 C9 -178.5(5) C5 C6 C7 C8 1.9(10) C9 C6 C7 C8 -179.2(5) C6 C7 C8 C8A 0.3(10) C7 C8 C8A C1 178.3(6) C7 C8 C8A C3A -4.4(9) C2 C1 C8A C8 178.2(5) Br1 C1 C8A C8 -4.8(9) C2 C1 C8A C3A 0.3(6) Br1 C1 C8A C3A 177.4(4) C4 C3A C8A C8 4.3(9) C3 C3A C8A C8 -177.6(5) C4 C3A C8A C1 -177.8(5) C3 C3A C8A C1 0.3(6) C10 O1 C9 O2 -1.1(8) C10 O1 C9 C6 177.4(4) C7 C6 C9 O2 -4.5(8) C5 C6 C9 O2 174.5(5) C7 C6 C9 O1 177.0(5) C5 C6 C9 O1 -4.0(7) C9 O1 C10 C11 -170.6(5) C8A' C1' C2' C3' -1.3(6) Br1' C1' C2' C3' -177.8(4) C1' C2' C3' C3A' 0.7(6) C1' C2' C3' Br2' 179.1(4) C2' C3' C3A' C4' 178.0(5) Br2' C3' C3A' C4' -0.4(8) C2' C3' C3A' C8A' 0.1(6) Br2' C3' C3A' C8A' -178.3(4) C3' C3A' C4' C5' -178.0(6) C8A' C3A' C4' C5' -0.5(10) C3A' C4' C5' C6' -1.4(10) C4' C5' C6' C7' 1.8(10) C4' C5' C6' C9' -178.3(5) C5' C6' C7' C8' -0.5(10) C9' C6' C7' C8' 179.6(6) C6' C7' C8' C8A' -0.2(10) C2' C1' C8A' C8' -179.0(5) Br1' C1' C8A' C8' -2.7(8) C2' C1' C8A' C3A' 1.3(6) Br1' C1' C8A' C3A' 177.7(4) C7' C8' C8A' C1' 179.7(6) C7' C8' C8A' C3A' -0.7(10) C4' C3A' C8A' C1' -178.8(5) C3' C3A' C8A' C1' -0.9(6) C4' C3A' C8A' C8' 1.6(9) C3' C3A' C8A' C8' 179.5(5) C10' O1' C9' O2' -0.8(8) C10' O1' C9' C6' 179.2(4) C7' C6' C9' O2' -3.9(8) C5' C6' C9' O2' 176.2(5) C7' C6' C9' O1' 176.0(5) C5' C6' C9' O1' -3.8(7) C9' O1' C10' C11' -169.9(5) loop_ _cod_related_entry_id _cod_related_entry_database _cod_related_entry_code 1 ChemSpider 9683525 2 PubChem 139067443