# Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry.
# This journal is © The Royal Society of Chemistry 2015

####################################################################### 
# 
# 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. 
# 
#######################################################################

data_ax73m
_database_code_depnum_ccdc_archive 'CCDC 1044784'
_audit_update_record             
;
2015-01-22 deposited with the CCDC.
2015-03-12 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-2014/7
_shelx_SHELXL_version_number     2014/7
_chemical_name_systematic        ?
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         ?
_chemical_formula_sum            'C20 H18 Cl2 O2'
_chemical_formula_weight         361.24

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'
Cl Cl 0.1484 0.1585 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_H-M_alt        'P 21/n'
_space_group_name_Hall           '-P 2yn'

_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.
;

loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x+1/2, y+1/2, -z+1/2'
'-x, -y, -z'
'x-1/2, -y-1/2, z-1/2'

_cell_length_a                   11.7351(14)
_cell_length_b                   10.1832(12)
_cell_length_c                   14.5872(18)
_cell_angle_alpha                90
_cell_angle_beta                 99.078(2)
_cell_angle_gamma                90
_cell_volume                     1721.3(4)
_cell_formula_units_Z            4
_cell_measurement_temperature    294(2)
_cell_measurement_reflns_used    4499
_cell_measurement_theta_min      2.42
_cell_measurement_theta_max      23.93

_exptl_crystal_description       block
_exptl_crystal_colour            colorless
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_density_diffrn    1.394
_exptl_crystal_F_000             752
_exptl_transmission_factor_min   ?
_exptl_transmission_factor_max   ?
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.09
_exptl_absorpt_coefficient_mu    0.386
_shelx_estimated_absorpt_T_min   ?
_shelx_estimated_absorpt_T_max   ?
_exptl_absorpt_correction_type   none
_exptl_absorpt_correction_T_min  ?
_exptl_absorpt_correction_T_max  ?
_exptl_absorpt_process_details   ?
_exptl_absorpt_special_details   ?

_diffrn_ambient_temperature      294(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  'Bruker SMART APEX CCD area-detector'
_diffrn_measurement_device       'Bruker SMART APEX CCD area-detector'
_diffrn_measurement_method       'ω scan'
_diffrn_detector_area_resol_mean ?
_diffrn_reflns_number            17811
_diffrn_reflns_av_unetI/netI     0.0236
_diffrn_reflns_av_R_equivalents  0.0315
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_theta_min         2.074
_diffrn_reflns_theta_max         26.240
_diffrn_reflns_theta_full        25.242
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measured_fraction_theta_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_point_group_measured_fraction_full 0.999
_reflns_number_total             3468
_reflns_number_gt                2896
_reflns_threshold_expression     'I > 2σ(I)'
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_max     .
_reflns_Friedel_fraction_full    .

_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.
;

_computing_data_collection       'SMART (Bruker, 2001)'
_computing_cell_refinement       'SAINT (Bruker, 2001)'
_computing_data_reduction        SAINT
_computing_structure_solution    'SHELXS-2014/7 (Sheldrick, 2015)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2015)'
_computing_molecular_graphics    'SHELXTL/PC (Sheldrick, 1990)'
_computing_publication_material  SHELXL-2014/7

_refine_special_details          ?
_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type           full
_refine_ls_weighting_scheme      calc
_refine_ls_weighting_details     
'w=1/[σ²(Fo²)+(0.0571P)²+0.5179P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_primary     ?
_atom_sites_solution_secondary   ?
_atom_sites_solution_hydrogens   geom
_refine_ls_hydrogen_treatment    constr
_refine_ls_extinction_method     none
_refine_ls_extinction_coef       .
_refine_ls_number_reflns         3468
_refine_ls_number_parameters     217
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0637
_refine_ls_R_factor_gt           0.0518
_refine_ls_wR_factor_ref         0.1258
_refine_ls_wR_factor_gt          0.1188
_refine_ls_goodness_of_fit_ref   1.119
_refine_ls_restrained_S_all      1.119
_refine_ls_shift/su_max          0.000
_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_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
C1 C 0.46062(17) 0.51336(18) 0.19573(14) 0.0370(4) Uani 1 1 d . . . . .
C2 C 0.48022(18) 0.3890(2) 0.16276(14) 0.0425(5) Uani 1 1 d . . . . .
C3 C 0.5737(2) 0.3135(2) 0.19973(16) 0.0518(6) Uani 1 1 d . . . . .
H3 H 0.5848 0.2302 0.1765 0.062 Uiso 1 1 calc R U . . .
C4 C 0.6503(2) 0.3648(2) 0.27198(16) 0.0516(6) Uani 1 1 d . . . . .
C5 C 0.63696(19) 0.4892(2) 0.30555(16) 0.0481(5) Uani 1 1 d . . . . .
H5 H 0.6910 0.5237 0.3529 0.058 Uiso 1 1 calc R U . . .
C6 C 0.54207(18) 0.5615(2) 0.26775(14) 0.0426(5) Uani 1 1 d . . . . .
H6 H 0.5320 0.6451 0.2910 0.051 Uiso 1 1 calc R U . . .
C7 C 0.35855(17) 0.5956(2) 0.15526(13) 0.0388(4) Uani 1 1 d . . . . .
H7 H 0.2921 0.5382 0.1360 0.047 Uiso 1 1 calc R U . . .
C8 C 0.22821(19) 0.7504(2) 0.19694(16) 0.0501(6) Uani 1 1 d . . . . .
H8A H 0.2113 0.8047 0.2478 0.060 Uiso 1 1 calc R U . . .
H8B H 0.1662 0.6870 0.1829 0.060 Uiso 1 1 calc R U . . .
C9 C 0.23058(19) 0.8369(2) 0.11221(15) 0.0453(5) Uani 1 1 d . . . . .
C10 C 0.28194(17) 0.76411(19) 0.03507(14) 0.0393(5) Uani 1 1 d . . . . .
C11 C 0.38245(17) 0.6755(2) 0.07216(14) 0.0395(5) Uani 1 1 d . . . . .
H11A H 0.4509 0.7286 0.0903 0.047 Uiso 1 1 calc R U . . .
H11B H 0.3975 0.6163 0.0234 0.047 Uiso 1 1 calc R U . . .
C12 C 0.3077(2) 0.9576(2) 0.12977(17) 0.0585(6) Uani 1 1 d . . . . .
H12A H 0.2652 1.0318 0.1488 0.070 Uiso 1 1 calc R U . . .
H12B H 0.3736 0.9402 0.1773 0.070 Uiso 1 1 calc R U . . .
C13 C 0.3454(3) 0.9831(3) 0.0372(2) 0.0737(8) Uani 1 1 d . . . . .
H13A H 0.3038 1.0577 0.0071 0.088 Uiso 1 1 calc R U . . .
H13B H 0.4273 1.0028 0.0460 0.088 Uiso 1 1 calc R U . . .
C14 C 0.1052(2) 0.8658(3) 0.06729(18) 0.0593(6) Uani 1 1 d . . . . .
H14A H 0.0538 0.8640 0.1132 0.071 Uiso 1 1 calc R U . . .
H14B H 0.0994 0.9509 0.0369 0.071 Uiso 1 1 calc R U . . .
C15 C 0.07735(19) 0.7569(2) -0.00221(16) 0.0518(6) Uani 1 1 d . . . . .
C16 C -0.0285(2) 0.7119(3) -0.0452(2) 0.0673(7) Uani 1 1 d . . . . .
H16 H -0.0962 0.7508 -0.0328 0.081 Uiso 1 1 calc R U . . .
C17 C -0.0328(3) 0.6088(3) -0.1065(2) 0.0764(9) Uani 1 1 d . . . . .
H17 H -0.1039 0.5775 -0.1354 0.092 Uiso 1 1 calc R U . . .
C18 C 0.0668(3) 0.5517(3) -0.12546(18) 0.0719(8) Uani 1 1 d . . . . .
H18 H 0.0623 0.4828 -0.1677 0.086 Uiso 1 1 calc R U . . .
C19 C 0.1743(2) 0.5952(2) -0.08247(15) 0.0541(6) Uani 1 1 d . . . . .
H19 H 0.2417 0.5555 -0.0948 0.065 Uiso 1 1 calc R U . . .
C20 C 0.17842(19) 0.6987(2) -0.02104(14) 0.0442(5) Uani 1 1 d . . . . .
Cl1 Cl 0.38328(5) 0.32371(6) 0.07095(4) 0.0593(2) Uani 1 1 d . . . . .
Cl2 Cl 0.76715(7) 0.26971(8) 0.32125(6) 0.0876(3) Uani 1 1 d . . . . .
O1 O 0.33306(12) 0.68217(15) 0.22598(9) 0.0457(4) Uani 1 1 d . . . . .
O2 O 0.32193(13) 0.86845(14) -0.01931(10) 0.0487(4) Uani 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
C1 C2 1.387(3) . ?
C1 C6 1.393(3) . ?
C1 C7 1.504(3) . ?
C2 C3 1.378(3) . ?
C2 Cl1 1.746(2) . ?
C3 C4 1.376(3) . ?
C3 H3 0.9300 . ?
C4 C5 1.376(3) . ?
C4 Cl2 1.738(2) . ?
C5 C6 1.376(3) . ?
C5 H5 0.9300 . ?
C6 H6 0.9300 . ?
C7 O1 1.424(2) . ?
C7 C11 1.522(3) . ?
C7 H7 0.9800 . ?
C8 O1 1.418(3) . ?
C8 C9 1.521(3) . ?
C8 H8A 0.9700 . ?
C8 H8B 0.9700 . ?
C9 C12 1.524(3) . ?
C9 C14 1.541(3) . ?
C9 C10 1.547(3) . ?
C10 O2 1.448(2) . ?
C10 C20 1.509(3) . ?
C10 C11 1.515(3) . ?
C11 H11A 0.9700 . ?
C11 H11B 0.9700 . ?
C12 C13 1.508(4) . ?
C12 H12A 0.9700 . ?
C12 H12B 0.9700 . ?
C13 O2 1.430(3) . ?
C13 H13A 0.9700 . ?
C13 H13B 0.9700 . ?
C14 C15 1.504(3) . ?
C14 H14A 0.9700 . ?
C14 H14B 0.9700 . ?
C15 C16 1.378(3) . ?
C15 C20 1.392(3) . ?
C16 C17 1.375(4) . ?
C16 H16 0.9300 . ?
C17 C18 1.372(4) . ?
C17 H17 0.9300 . ?
C18 C19 1.390(4) . ?
C18 H18 0.9300 . ?
C19 C20 1.379(3) . ?
C19 H19 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
C2 C1 C6 116.84(19) . . ?
C2 C1 C7 122.55(18) . . ?
C6 C1 C7 120.60(17) . . ?
C3 C2 C1 122.6(2) . . ?
C3 C2 Cl1 118.04(16) . . ?
C1 C2 Cl1 119.34(17) . . ?
C4 C3 C2 118.2(2) . . ?
C4 C3 H3 120.9 . . ?
C2 C3 H3 120.9 . . ?
C3 C4 C5 121.6(2) . . ?
C3 C4 Cl2 118.86(18) . . ?
C5 C4 Cl2 119.50(19) . . ?
C6 C5 C4 118.8(2) . . ?
C6 C5 H5 120.6 . . ?
C4 C5 H5 120.6 . . ?
C5 C6 C1 122.0(2) . . ?
C5 C6 H6 119.0 . . ?
C1 C6 H6 119.0 . . ?
O1 C7 C1 107.80(16) . . ?
O1 C7 C11 109.41(16) . . ?
C1 C7 C11 112.02(15) . . ?
O1 C7 H7 109.2 . . ?
C1 C7 H7 109.2 . . ?
C11 C7 H7 109.2 . . ?
O1 C8 C9 113.58(17) . . ?
O1 C8 H8A 108.9 . . ?
C9 C8 H8A 108.9 . . ?
O1 C8 H8B 108.9 . . ?
C9 C8 H8B 108.9 . . ?
H8A C8 H8B 107.7 . . ?
C8 C9 C12 114.62(19) . . ?
C8 C9 C14 108.51(19) . . ?
C12 C9 C14 114.76(19) . . ?
C8 C9 C10 111.91(16) . . ?
C12 C9 C10 102.67(18) . . ?
C14 C9 C10 103.75(17) . . ?
O2 C10 C20 109.26(16) . . ?
O2 C10 C11 109.34(16) . . ?
C20 C10 C11 116.45(17) . . ?
O2 C10 C9 104.14(15) . . ?
C20 C10 C9 103.50(17) . . ?
C11 C10 C9 113.34(16) . . ?
C10 C11 C7 111.81(16) . . ?
C10 C11 H11A 109.3 . . ?
C7 C11 H11A 109.3 . . ?
C10 C11 H11B 109.3 . . ?
C7 C11 H11B 109.3 . . ?
H11A C11 H11B 107.9 . . ?
C13 C12 C9 103.80(19) . . ?
C13 C12 H12A 111.0 . . ?
C9 C12 H12A 111.0 . . ?
C13 C12 H12B 111.0 . . ?
C9 C12 H12B 111.0 . . ?
H12A C12 H12B 109.0 . . ?
O2 C13 C12 108.6(2) . . ?
O2 C13 H13A 110.0 . . ?
C12 C13 H13A 110.0 . . ?
O2 C13 H13B 110.0 . . ?
C12 C13 H13B 110.0 . . ?
H13A C13 H13B 108.4 . . ?
C15 C14 C9 103.70(18) . . ?
C15 C14 H14A 111.0 . . ?
C9 C14 H14A 111.0 . . ?
C15 C14 H14B 111.0 . . ?
C9 C14 H14B 111.0 . . ?
H14A C14 H14B 109.0 . . ?
C16 C15 C20 120.3(2) . . ?
C16 C15 C14 129.5(2) . . ?
C20 C15 C14 110.2(2) . . ?
C17 C16 C15 119.2(3) . . ?
C17 C16 H16 120.4 . . ?
C15 C16 H16 120.4 . . ?
C18 C17 C16 120.7(3) . . ?
C18 C17 H17 119.7 . . ?
C16 C17 H17 119.7 . . ?
C17 C18 C19 121.0(3) . . ?
C17 C18 H18 119.5 . . ?
C19 C18 H18 119.5 . . ?
C20 C19 C18 118.2(3) . . ?
C20 C19 H19 120.9 . . ?
C18 C19 H19 120.9 . . ?
C19 C20 C15 120.7(2) . . ?
C19 C20 C10 129.2(2) . . ?
C15 C20 C10 110.07(19) . . ?
C8 O1 C7 111.00(15) . . ?
C13 O2 C10 109.43(16) . . ?

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
C6 C1 C2 C3 1.5(3) . . . . ?
C7 C1 C2 C3 179.96(19) . . . . ?
C6 C1 C2 Cl1 -178.68(15) . . . . ?
C7 C1 C2 Cl1 -0.2(3) . . . . ?
C1 C2 C3 C4 -0.2(3) . . . . ?
Cl1 C2 C3 C4 179.91(17) . . . . ?
C2 C3 C4 C5 -1.8(3) . . . . ?
C2 C3 C4 Cl2 178.61(17) . . . . ?
C3 C4 C5 C6 2.4(3) . . . . ?
Cl2 C4 C5 C6 -177.96(17) . . . . ?
C4 C5 C6 C1 -1.1(3) . . . . ?
C2 C1 C6 C5 -0.8(3) . . . . ?
C7 C1 C6 C5 -179.31(19) . . . . ?
C2 C1 C7 O1 153.34(18) . . . . ?
C6 C1 C7 O1 -28.2(2) . . . . ?
C2 C1 C7 C11 -86.2(2) . . . . ?
C6 C1 C7 C11 92.2(2) . . . . ?
O1 C8 C9 C12 -69.9(2) . . . . ?
O1 C8 C9 C14 160.34(19) . . . . ?
O1 C8 C9 C10 46.5(3) . . . . ?
C8 C9 C10 O2 -156.95(17) . . . . ?
C12 C9 C10 O2 -33.5(2) . . . . ?
C14 C9 C10 O2 86.3(2) . . . . ?
C8 C9 C10 C20 88.8(2) . . . . ?
C12 C9 C10 C20 -147.76(17) . . . . ?
C14 C9 C10 C20 -28.0(2) . . . . ?
C8 C9 C10 C11 -38.2(2) . . . . ?
C12 C9 C10 C11 85.2(2) . . . . ?
C14 C9 C10 C11 -155.01(18) . . . . ?
O2 C10 C11 C7 159.75(16) . . . . ?
C20 C10 C11 C7 -75.8(2) . . . . ?
C9 C10 C11 C7 44.1(2) . . . . ?
O1 C7 C11 C10 -57.2(2) . . . . ?
C1 C7 C11 C10 -176.71(16) . . . . ?
C8 C9 C12 C13 151.1(2) . . . . ?
C14 C9 C12 C13 -82.3(3) . . . . ?
C10 C9 C12 C13 29.6(2) . . . . ?
C9 C12 C13 O2 -15.7(3) . . . . ?
C8 C9 C14 C15 -91.0(2) . . . . ?
C12 C9 C14 C15 139.4(2) . . . . ?
C10 C9 C14 C15 28.2(2) . . . . ?
C9 C14 C15 C16 161.3(2) . . . . ?
C9 C14 C15 C20 -18.3(3) . . . . ?
C20 C15 C16 C17 0.2(4) . . . . ?
C14 C15 C16 C17 -179.4(2) . . . . ?
C15 C16 C17 C18 -0.5(4) . . . . ?
C16 C17 C18 C19 0.8(4) . . . . ?
C17 C18 C19 C20 -0.9(4) . . . . ?
C18 C19 C20 C15 0.6(3) . . . . ?
C18 C19 C20 C10 179.5(2) . . . . ?
C16 C15 C20 C19 -0.2(3) . . . . ?
C14 C15 C20 C19 179.4(2) . . . . ?
C16 C15 C20 C10 -179.4(2) . . . . ?
C14 C15 C20 C10 0.3(3) . . . . ?
O2 C10 C20 C19 88.2(3) . . . . ?
C11 C10 C20 C19 -36.2(3) . . . . ?
C9 C10 C20 C19 -161.3(2) . . . . ?
O2 C10 C20 C15 -92.7(2) . . . . ?
C11 C10 C20 C15 142.82(18) . . . . ?
C9 C10 C20 C15 17.8(2) . . . . ?
C9 C8 O1 C7 -61.6(2) . . . . ?
C1 C7 O1 C8 -171.99(16) . . . . ?
C11 C7 O1 C8 66.0(2) . . . . ?
C12 C13 O2 C10 -6.0(3) . . . . ?
C20 C10 O2 C13 134.9(2) . . . . ?
C11 C10 O2 C13 -96.6(2) . . . . ?
C9 C10 O2 C13 24.9(2) . . . . ?

_refine_diff_density_max         0.316
_refine_diff_density_min         -0.172
_refine_diff_density_rms         0.047

