# Electronic Supplementary Material (ESI) for Chemical Science.
# This journal is © The Royal Society of Chemistry 2017

####################################################################### 
# 
# This file contains crystal structure data downloaded from the 
# Cambridge Structural Database (CSD) hosted by the Cambridge 
# Crystallographic Data Centre (CCDC).
# 
# Full information about CCDC data access policies and citation 
# guidelines are available at http://www.ccdc.cam.ac.uk/access/V1 
# 
# Audit and citation data items may have been added by the CCDC. 
# Please retain this information to preserve the provenance of 
# this file and to allow appropriate attribution of the data. 
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data_ARC-VII-358A-01
_database_code_depnum_ccdc_archive 'CCDC 1491357'
_audit_update_record             
;
2016-07-07 deposited with the CCDC.
2017-07-31 downloaded from the CCDC.
;
_audit_creation_date             2016-07-06
_audit_creation_method           
;
  Olex2 1.2
  (compiled 2012.05.09 svn.r2324, GUI svn.r4230)
;
_chemical_name_common            ?
_chemical_name_systematic        ?
_chemical_formula_moiety         'C23 H21 Br O4'
_chemical_formula_sum            'C23 H21 Br O4'
_chemical_formula_weight         441.31
_chemical_absolute_configuration syn
_chemical_melting_point          ?
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'

_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_H-M_alt        'P 1 21 1'
_space_group_name_Hall           'P 2yb'
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x, y+1/2, -z'

_cell_length_a                   8.473(5)
_cell_length_b                   10.542(5)
_cell_length_c                   11.891(5)
_cell_angle_alpha                90.000(5)
_cell_angle_beta                 106.339(5)
_cell_angle_gamma                90.000(5)
_cell_volume                     1019.2(9)
_cell_formula_units_Z            2
_cell_measurement_reflns_used    9781
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.53
_cell_measurement_theta_min      3.16
_exptl_absorpt_coefficient_mu    2.042
_exptl_absorpt_correction_T_max  0.920
_exptl_absorpt_correction_T_min  0.647
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_absorpt_special_details   ?
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.438
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_description       Block
_exptl_crystal_F_000             452
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.10
_exptl_transmission_factor_max   ?
_exptl_transmission_factor_min   ?
_diffrn_reflns_av_R_equivalents  0.0398
_diffrn_reflns_av_unetI/netI     0.0243
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            36769
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.595
_diffrn_reflns_theta_min         3.164
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean ?
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'φ and ω scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_source                   ?
_reflns_Friedel_coverage         0.897
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.996
_reflns_number_gt                4354
_reflns_number_total             4681
_reflns_special_details          
;
 Reflections were merged by SHELXL according to the crystal
 class for the calculation of statistics and refinement.
 
 _reflns_Friedel_fraction is defined as the number of unique
 Friedel pairs measured divided by the number that would be
 possible theoretically, ignoring centric projections and
 systematic absences.
;
_reflns_threshold_expression     'I > 2σ(I)'
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material  
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_refine_diff_density_max         0.386
_refine_diff_density_min         -0.217
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details 
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.001(8)
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     338
_refine_ls_number_reflns         4681
_refine_ls_number_restraints     1
_refine_ls_R_factor_all          0.0368
_refine_ls_R_factor_gt           0.0323
_refine_ls_restrained_S_all      1.042
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details     
'w=1/[σ²(Fo²)+(0.0540P)²+0.1457P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0767
_refine_ls_wR_factor_ref         0.0785
_refine_special_details          
;
 Refined as a 2-component inversion twin.
;
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     ?
_atom_sites_solution_secondary   ?
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_site_symmetry_order
_atom_site_calc_flag
_atom_site_refinement_flags_posn
_atom_site_refinement_flags_adp
_atom_site_refinement_flags_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
Br01 Br 0.61029(4) -0.71755(3) 0.63160(3) 0.03647(12) Uani 1 1 d . . . . .
O002 O 0.2634(3) -1.1623(2) 0.8853(2) 0.0298(5) Uani 1 1 d . . . . .
O003 O 0.0980(3) -1.3270(2) 0.80658(19) 0.0243(5) Uani 1 1 d . . . . .
O004 O 0.0366(3) -1.2065(3) 0.5555(2) 0.0320(5) Uani 1 1 d . . . . .
O005 O 0.4647(4) -1.4400(3) 0.8660(2) 0.0417(7) Uani 1 1 d . . . . .
C006 C 0.2677(4) -1.0642(3) 0.5995(3) 0.0209(6) Uani 1 1 d . . . . .
C007 C 0.1431(5) -1.6558(3) 0.7258(3) 0.0260(7) Uani 1 1 d . . . . .
C008 C 0.4271(4) -1.0714(3) 0.6732(3) 0.0224(6) Uani 1 1 d . . . . .
C009 C 0.0087(4) -1.3309(4) 0.8972(3) 0.0297(7) Uani 1 1 d . . . . .
C010 C 0.3995(5) -1.7011(5) 0.8696(3) 0.0314(10) Uani 1 1 d . . . . .
C011 C 0.1763(4) -1.1800(3) 0.6091(3) 0.0223(7) Uani 1 1 d . . . . .
C012 C 0.4730(4) -0.8631(3) 0.6159(3) 0.0255(7) Uani 1 1 d . . . . .
C013 C 0.2895(4) -1.2627(3) 0.7089(3) 0.0215(6) Uani 1 1 d . . . . .
C014 C 0.2908(4) -1.4025(3) 0.6787(3) 0.0219(6) Uani 1 1 d . . . . .
C015 C 0.4598(4) -1.1981(3) 0.7345(3) 0.0269(7) Uani 1 1 d . . . . .
C016 C 0.3155(4) -0.8554(3) 0.5396(3) 0.0270(7) Uani 1 1 d . . . . .
C017 C 0.3591(4) -1.4853(3) 0.7839(3) 0.0248(6) Uani 1 1 d . . . . .
C018 C 0.2107(4) -0.9582(3) 0.5310(3) 0.0249(7) Uani 1 1 d . . . . .
C019 C -0.1145(5) -1.4363(5) 0.8544(4) 0.0417(10) Uani 1 1 d . . . . .
C020 C 0.3466(5) -1.8221(4) 0.8808(3) 0.0366(9) Uani 1 1 d . . . . .
C021 C 0.2181(4) -1.2436(3) 0.8129(3) 0.0213(6) Uani 1 1 d . . . . .
C022 C 0.5330(4) -0.9691(3) 0.6828(3) 0.0250(6) Uani 1 1 d . . . . .
C023 C 0.0900(5) -1.7778(4) 0.7389(3) 0.0329(8) Uani 1 1 d . . . . .
C024 C 0.2528(5) -1.4487(4) 0.5709(3) 0.0294(7) Uani 1 1 d . . . . .
C025 C -0.0783(6) -1.2056(6) 0.8996(4) 0.0447(10) Uani 1 1 d . . . . .
C026 C 0.2984(4) -1.6159(3) 0.7902(3) 0.0235(6) Uani 1 1 d . . . . .
C027 C 0.1301(6) -1.3636(5) 1.0147(4) 0.0404(9) Uani 1 1 d . . . . .
C028 C 0.1926(5) -1.8609(4) 0.8157(3) 0.0352(8) Uani 1 1 d . . . . .
H5 H 0.502(5) -1.674(4) 0.911(3) 0.023(9) Uiso 1 1 d . . . . .
H12 H 0.094(6) -0.955(5) 0.483(4) 0.041(12) Uiso 1 1 d . . . . .
H9 H 0.509(5) -1.188(4) 0.819(4) 0.034(11) Uiso 1 1 d . . . . .
H10 H 0.644(5) -0.973(4) 0.736(3) 0.027(10) Uiso 1 1 d . . . . .
H2 H -0.019(6) -1.807(4) 0.696(4) 0.032(11) Uiso 1 1 d . . . . .
H4 H 0.415(5) -1.873(5) 0.937(4) 0.036(11) Uiso 1 1 d . . . . .
H8 H 0.524(5) -1.249(4) 0.702(4) 0.031(11) Uiso 1 1 d . . . . .
H7 H 0.220(5) -1.396(5) 0.504(4) 0.036(11) Uiso 1 1 d . . . . .
H6 H 0.261(5) -1.530(5) 0.554(4) 0.031(11) Uiso 1 1 d . . . . .
H11 H 0.279(5) -0.785(4) 0.496(3) 0.024(9) Uiso 1 1 d . . . . .
H1 H 0.078(6) -1.603(4) 0.678(4) 0.032(10) Uiso 1 1 d . . . . .
H3 H 0.155(6) -1.949(5) 0.825(4) 0.041(12) Uiso 1 1 d . . . . .
H15 H -0.143(6) -1.216(7) 0.953(4) 0.054(12) Uiso 1 1 d . . . . .
H17 H -0.053(6) -1.519(5) 0.848(4) 0.048(13) Uiso 1 1 d . . . . .
H20 H 0.203(7) -1.296(5) 1.044(5) 0.052(14) Uiso 1 1 d . . . . .
H13 H -0.146(6) -1.183(5) 0.826(4) 0.043(13) Uiso 1 1 d . . . . .
H19 H 0.193(6) -1.439(6) 1.003(4) 0.051(14) Uiso 1 1 d . . . . .
H14 H 0.000(5) -1.135(4) 0.928(3) 0.025(10) Uiso 1 1 d . . . . .
H21 H 0.072(6) -1.383(5) 1.075(4) 0.044(12) Uiso 1 1 d . . . . .
H18 H -0.177(7) -1.444(5) 0.902(5) 0.051(14) Uiso 1 1 d . . . . .
H16 H -0.185(6) -1.423(5) 0.777(5) 0.048(13) Uiso 1 1 d . . . . .


_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
Br01 C012 1.902(3) . ?
O002 C021 1.198(4) . ?
O003 C009 1.481(4) . ?
O003 C021 1.330(4) . ?
O004 C011 1.208(4) . ?
O005 C017 1.221(4) . ?
C006 C008 1.390(5) . ?
C006 C011 1.466(4) . ?
C006 C018 1.387(5) . ?
C007 C023 1.386(5) . ?
C007 C026 1.389(5) . ?
C008 C015 1.510(5) . ?
C008 C022 1.387(5) . ?
C009 C019 1.511(6) . ?
C009 C025 1.517(7) . ?
C009 C027 1.523(6) . ?
C010 C020 1.370(7) . ?
C010 C026 1.406(5) . ?
C011 C013 1.565(4) . ?
C012 C016 1.389(5) . ?
C012 C022 1.383(5) . ?
C013 C014 1.518(4) . ?
C013 C015 1.546(4) . ?
C013 C021 1.536(4) . ?
C014 C017 1.501(5) . ?
C014 C024 1.323(5) . ?
C016 C018 1.387(5) . ?
C017 C026 1.479(5) . ?
C020 C028 1.379(6) . ?
C023 C028 1.382(6) . ?

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
C021 O003 C009 121.1(3) . . ?
C008 C006 C011 110.3(3) . . ?
C018 C006 C008 122.0(3) . . ?
C018 C006 C011 127.7(3) . . ?
C023 C007 C026 120.4(3) . . ?
C006 C008 C015 111.5(3) . . ?
C022 C008 C006 120.1(3) . . ?
C022 C008 C015 128.4(3) . . ?
O003 C009 C019 102.8(3) . . ?
O003 C009 C025 109.8(3) . . ?
O003 C009 C027 108.8(3) . . ?
C019 C009 C025 110.7(4) . . ?
C019 C009 C027 111.5(4) . . ?
C025 C009 C027 112.7(4) . . ?
C020 C010 C026 120.4(4) . . ?
O004 C011 C006 127.7(3) . . ?
O004 C011 C013 124.8(3) . . ?
C006 C011 C013 107.3(3) . . ?
C016 C012 Br01 117.7(3) . . ?
C022 C012 Br01 118.7(3) . . ?
C022 C012 C016 123.6(3) . . ?
C014 C013 C011 113.9(3) . . ?
C014 C013 C015 114.0(3) . . ?
C014 C013 C021 110.4(3) . . ?
C015 C013 C011 104.1(3) . . ?
C021 C013 C011 104.0(2) . . ?
C021 C013 C015 109.9(3) . . ?
C017 C014 C013 113.2(3) . . ?
C024 C014 C013 124.8(3) . . ?
C024 C014 C017 121.6(3) . . ?
C008 C015 C013 105.1(3) . . ?
C018 C016 C012 118.7(3) . . ?
O005 C017 C014 117.6(3) . . ?
O005 C017 C026 120.7(3) . . ?
C026 C017 C014 121.7(3) . . ?
C016 C018 C006 118.5(3) . . ?
C010 C020 C028 120.4(3) . . ?
O002 C021 O003 126.8(3) . . ?
O002 C021 C013 123.6(3) . . ?
O003 C021 C013 109.6(2) . . ?
C012 C022 C008 117.2(3) . . ?
C028 C023 C007 119.9(4) . . ?
C007 C026 C010 118.7(3) . . ?
C007 C026 C017 122.9(3) . . ?
C010 C026 C017 118.3(3) . . ?
C020 C028 C023 120.2(4) . . ?

_shelx_estimated_absorpt_T_max   ?
_shelx_estimated_absorpt_T_min   ?
_shelx_SHELXL_version_number     2014/7
_shelx_space_group_comment       
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
