# Electronic Supplementary Material (ESI) for ChemComm.
# This journal is © The Royal Society of Chemistry 2014

####################################################################### 
# 
# 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_s2091lm
_database_code_depnum_ccdc_archive 'CCDC 1037667'
_audit_update_record             
;
2014-12-04 deposited with the CCDC.
2014-12-22 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-97
_chemical_name_systematic        
; 
 ? 
;
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         'C15 H18 O4'
_chemical_formula_sum            'C15 H18 O4'
_chemical_formula_weight         262.29

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'

_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 21/c'
_symmetry_space_group_name_Hall  '-P 2ybc'

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

_cell_length_a                   8.5618(7)
_cell_length_b                   8.4049(9)
_cell_length_c                   18.442(2)
_cell_angle_alpha                90.00
_cell_angle_beta                 93.163(5)
_cell_angle_gamma                90.00
_cell_volume                     1325.1(2)
_cell_formula_units_Z            4
_cell_measurement_temperature    100(2)
_cell_measurement_reflns_used    1518
_cell_measurement_theta_min      2.21
_cell_measurement_theta_max      26.48

_exptl_crystal_description       block
_exptl_crystal_colour            colourless
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.09
_exptl_crystal_density_meas      ?
_exptl_crystal_density_diffrn    1.315
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             560
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_correction_T_min  0.6938
_exptl_absorpt_correction_T_max  0.7438
_exptl_absorpt_process_details   'Blessing, 1995'

_exptl_special_details           
; 
 ? 
;

_diffrn_ambient_temperature      100(2)
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_type           MoK\a
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_monochromator  Triumph
_diffrn_measurement_device_type  'Bruker Kappa APEXII Duo'
_diffrn_measurement_method       'Omega + Phi Scans'
_diffrn_detector_area_resol_mean ?
_diffrn_standards_number         0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  ?
_diffrn_standards_decay_%        0
_diffrn_reflns_number            9858
_diffrn_reflns_av_R_equivalents  0.0907
_diffrn_reflns_av_sigmaI/netI    0.1064
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_theta_min         2.21
_diffrn_reflns_theta_max         26.48
_reflns_number_total             2731
_reflns_number_gt                1518
_reflns_threshold_expression     >2sigma(I)

_computing_data_collection       'Bruker APEXII Software Suite, 2008'
_computing_cell_refinement       'Bruker APEXII Software Suite, 2008'
_computing_data_reduction        'Bruker APEXII Software Suite, 2008'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_molecular_graphics    'SHELXTL-plus, XP (Sheldrick, 1991)'
_computing_publication_material  ?

_refine_special_details          
; 
 Refinement of F² against ALL reflections.  The weighted R-factor wR and 
 goodness of fit S are based on F², conventional R-factors R are based 
 on F, with F set to zero for negative F². The threshold expression of 
 F² > 2sigma(F²) is used only for calculating R-factors(gt) etc. and is 
 not relevant to the choice of reflections for refinement.  R-factors based 
 on F² are statistically about twice as large as those based on F, and R- 
 factors based on ALL data will be even larger. 
;

_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type           full
_refine_ls_weighting_scheme      calc
_refine_ls_weighting_details     
'calc w=1/[σ²(Fo²)+(0.0204P)²+0.0000P] where P=(Fo²+2Fc²)/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     SHELXL
_refine_ls_extinction_coef       0.0060(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_number_reflns         2731
_refine_ls_number_parameters     176
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.1314
_refine_ls_R_factor_gt           0.0538
_refine_ls_wR_factor_ref         0.0840
_refine_ls_wR_factor_gt          0.0736
_refine_ls_goodness_of_fit_ref   1.024
_refine_ls_restrained_S_all      1.024
_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_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_assembly
_atom_site_disorder_group
O1 O 0.05456(15) 0.86066(18) 0.35037(8) 0.0190(4) Uani 1 1 d . . .
C1 C 0.1237(2) 0.7425(3) 0.37540(11) 0.0159(6) Uani 1 1 d . . .
O2 O 0.22907(16) 0.89578(18) 0.50520(8) 0.0221(4) Uani 1 1 d . . .
C2 C 0.0450(2) 0.5897(3) 0.38011(11) 0.0135(5) Uani 1 1 d . . .
O3 O 0.38018(17) 1.02820(19) 0.42953(8) 0.0241(4) Uani 1 1 d . . .
C3 C 0.1223(2) 0.4545(3) 0.39728(11) 0.0152(5) Uani 1 1 d . . .
O4 O -0.22249(16) 0.58287(19) 0.40706(8) 0.0252(4) Uani 1 1 d . . .
C4 C 0.2961(2) 0.4547(3) 0.41501(11) 0.0154(5) Uani 1 1 d . . .
H4 H 0.3175 0.3719 0.4532 0.018 Uiso 1 1 calc R . .
C5 C 0.3480(2) 0.6135(3) 0.44782(11) 0.0166(5) Uani 1 1 d . . .
H5A H 0.4635 0.6139 0.4550 0.020 Uiso 1 1 calc R . .
H5B H 0.3042 0.6246 0.4961 0.020 Uiso 1 1 calc R . .
C6 C 0.2970(2) 0.7570(3) 0.40083(11) 0.0139(5) Uani 1 1 d . . .
C7 C 0.3941(2) 0.7738(3) 0.33324(11) 0.0174(6) Uani 1 1 d . . .
H7A H 0.3791 0.8825 0.3134 0.021 Uiso 1 1 calc R . .
H7B H 0.5062 0.7621 0.3486 0.021 Uiso 1 1 calc R . .
C8 C 0.3549(2) 0.6561(3) 0.27348(12) 0.0204(6) Uani 1 1 d . . .
H8 H 0.3303 0.6983 0.2265 0.025 Uiso 1 1 calc R . .
C9 C 0.3514(2) 0.4994(3) 0.28017(12) 0.0198(6) Uani 1 1 d . . .
H9 H 0.3233 0.4402 0.2375 0.024 Uiso 1 1 calc R . .
C10 C 0.3874(2) 0.4055(3) 0.34834(11) 0.0196(6) Uani 1 1 d . . .
H10A H 0.5007 0.4151 0.3615 0.023 Uiso 1 1 calc R . .
H10B H 0.3655 0.2919 0.3378 0.023 Uiso 1 1 calc R . .
C11 C -0.1283(2) 0.5905(3) 0.36018(12) 0.0159(5) Uani 1 1 d . . .
C12 C -0.1762(2) 0.6016(3) 0.28165(11) 0.0244(6) Uani 1 1 d . . .
H12A H -0.2907 0.6029 0.2755 0.037 Uiso 1 1 calc R . .
H12B H -0.1356 0.5095 0.2561 0.037 Uiso 1 1 calc R . .
H12C H -0.1341 0.6996 0.2616 0.037 Uiso 1 1 calc R . .
C13 C 0.0424(2) 0.2956(3) 0.39912(13) 0.0228(6) Uani 1 1 d . . .
H13A H 0.0132 0.2730 0.4487 0.034 Uiso 1 1 calc R . .
H13B H 0.1136 0.2128 0.3834 0.034 Uiso 1 1 calc R . .
H13C H -0.0518 0.2974 0.3664 0.034 Uiso 1 1 calc R . .
C14 C 0.3105(2) 0.9105(3) 0.44537(12) 0.0174(5) Uani 1 1 d . . .
C15 C 0.2339(3) 1.0313(3) 0.55403(12) 0.0272(6) Uani 1 1 d . . .
H15A H 0.3391 1.0412 0.5774 0.041 Uiso 1 1 calc R . .
H15B H 0.1579 1.0158 0.5912 0.041 Uiso 1 1 calc R . .
H15C H 0.2080 1.1283 0.5265 0.041 Uiso 1 1 calc R . .


_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
O1 C1 1.233(2) . ?
C1 C2 1.455(3) . ?
C1 C6 1.536(3) . ?
O2 C14 1.343(2) . ?
O2 C15 1.451(2) . ?
C2 C3 1.344(3) . ?
C2 C11 1.508(3) . ?
O3 C14 1.199(3) . ?
C3 C13 1.501(3) . ?
C3 C4 1.506(3) . ?
O4 C11 1.216(2) . ?
C4 C5 1.521(3) . ?
C4 C10 1.549(3) . ?
C4 H4 1.0000 . ?
C5 C6 1.535(3) . ?
C5 H5A 0.9900 . ?
C5 H5B 0.9900 . ?
C6 C14 1.530(3) . ?
C6 C7 1.543(3) . ?
C7 C8 1.505(3) . ?
C7 H7A 0.9900 . ?
C7 H7B 0.9900 . ?
C8 C9 1.323(3) . ?
C8 H8 0.9500 . ?
C9 C10 1.502(3) . ?
C9 H9 0.9500 . ?
C10 H10A 0.9900 . ?
C10 H10B 0.9900 . ?
C11 C12 1.486(3) . ?
C12 H12A 0.9800 . ?
C12 H12B 0.9800 . ?
C12 H12C 0.9800 . ?
C13 H13A 0.9800 . ?
C13 H13B 0.9800 . ?
C13 H13C 0.9800 . ?
C15 H15A 0.9800 . ?
C15 H15B 0.9800 . ?
C15 H15C 0.9800 . ?

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 C1 C2 121.2(2) . . ?
O1 C1 C6 119.1(2) . . ?
C2 C1 C6 119.64(19) . . ?
C14 O2 C15 116.05(19) . . ?
C3 C2 C1 122.46(19) . . ?
C3 C2 C11 121.7(2) . . ?
C1 C2 C11 115.72(19) . . ?
C2 C3 C13 122.58(19) . . ?
C2 C3 C4 121.19(19) . . ?
C13 C3 C4 116.23(19) . . ?
C3 C4 C5 110.54(17) . . ?
C3 C4 C10 111.29(17) . . ?
C5 C4 C10 113.63(18) . . ?
C3 C4 H4 107.0 . . ?
C5 C4 H4 107.0 . . ?
C10 C4 H4 107.0 . . ?
C4 C5 C6 113.40(17) . . ?
C4 C5 H5A 108.9 . . ?
C6 C5 H5A 108.9 . . ?
C4 C5 H5B 108.9 . . ?
C6 C5 H5B 108.9 . . ?
H5A C5 H5B 107.7 . . ?
C14 C6 C5 110.43(18) . . ?
C14 C6 C1 105.90(17) . . ?
C5 C6 C1 110.49(18) . . ?
C14 C6 C7 109.19(18) . . ?
C5 C6 C7 112.25(18) . . ?
C1 C6 C7 108.37(17) . . ?
C8 C7 C6 115.05(18) . . ?
C8 C7 H7A 108.5 . . ?
C6 C7 H7A 108.5 . . ?
C8 C7 H7B 108.5 . . ?
C6 C7 H7B 108.5 . . ?
H7A C7 H7B 107.5 . . ?
C9 C8 C7 126.2(2) . . ?
C9 C8 H8 116.9 . . ?
C7 C8 H8 116.9 . . ?
C8 C9 C10 126.6(2) . . ?
C8 C9 H9 116.7 . . ?
C10 C9 H9 116.7 . . ?
C9 C10 C4 115.80(18) . . ?
C9 C10 H10A 108.3 . . ?
C4 C10 H10A 108.3 . . ?
C9 C10 H10B 108.3 . . ?
C4 C10 H10B 108.3 . . ?
H10A C10 H10B 107.4 . . ?
O4 C11 C12 122.51(19) . . ?
O4 C11 C2 120.55(19) . . ?
C12 C11 C2 116.93(18) . . ?
C11 C12 H12A 109.5 . . ?
C11 C12 H12B 109.5 . . ?
H12A C12 H12B 109.5 . . ?
C11 C12 H12C 109.5 . . ?
H12A C12 H12C 109.5 . . ?
H12B C12 H12C 109.5 . . ?
C3 C13 H13A 109.5 . . ?
C3 C13 H13B 109.5 . . ?
H13A C13 H13B 109.5 . . ?
C3 C13 H13C 109.5 . . ?
H13A C13 H13C 109.5 . . ?
H13B C13 H13C 109.5 . . ?
O3 C14 O2 124.3(2) . . ?
O3 C14 C6 126.0(2) . . ?
O2 C14 C6 109.6(2) . . ?
O2 C15 H15A 109.5 . . ?
O2 C15 H15B 109.5 . . ?
H15A C15 H15B 109.5 . . ?
O2 C15 H15C 109.5 . . ?
H15A C15 H15C 109.5 . . ?
H15B C15 H15C 109.5 . . ?

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
O1 C1 C2 C3 170.3(2) . . . . ?
C6 C1 C2 C3 -8.7(3) . . . . ?
O1 C1 C2 C11 -6.3(3) . . . . ?
C6 C1 C2 C11 174.75(17) . . . . ?
C1 C2 C3 C13 -177.4(2) . . . . ?
C11 C2 C3 C13 -1.0(3) . . . . ?
C1 C2 C3 C4 1.9(3) . . . . ?
C11 C2 C3 C4 178.23(18) . . . . ?
C2 C3 C4 C5 29.0(3) . . . . ?
C13 C3 C4 C5 -151.67(18) . . . . ?
C2 C3 C4 C10 -98.2(2) . . . . ?
C13 C3 C4 C10 81.1(2) . . . . ?
C3 C4 C5 C6 -53.8(2) . . . . ?
C10 C4 C5 C6 72.2(2) . . . . ?
C4 C5 C6 C14 163.84(17) . . . . ?
C4 C5 C6 C1 47.0(2) . . . . ?
C4 C5 C6 C7 -74.1(2) . . . . ?
O1 C1 C6 C14 45.3(2) . . . . ?
C2 C1 C6 C14 -135.7(2) . . . . ?
O1 C1 C6 C5 164.91(19) . . . . ?
C2 C1 C6 C5 -16.1(3) . . . . ?
O1 C1 C6 C7 -71.7(2) . . . . ?
C2 C1 C6 C7 107.3(2) . . . . ?
C14 C6 C7 C8 -162.31(18) . . . . ?
C5 C6 C7 C8 74.9(2) . . . . ?
C1 C6 C7 C8 -47.4(3) . . . . ?
C6 C7 C8 C9 -53.7(3) . . . . ?
C7 C8 C9 C10 -0.7(4) . . . . ?
C8 C9 C10 C4 52.9(3) . . . . ?
C3 C4 C10 C9 53.9(3) . . . . ?
C5 C4 C10 C9 -71.6(2) . . . . ?
C3 C2 C11 O4 78.8(3) . . . . ?
C1 C2 C11 O4 -104.6(2) . . . . ?
C3 C2 C11 C12 -101.4(2) . . . . ?
C1 C2 C11 C12 75.1(2) . . . . ?
C15 O2 C14 O3 -2.7(3) . . . . ?
C15 O2 C14 C6 178.57(17) . . . . ?
C5 C6 C14 O3 126.5(2) . . . . ?
C1 C6 C14 O3 -113.9(2) . . . . ?
C7 C6 C14 O3 2.6(3) . . . . ?
C5 C6 C14 O2 -54.8(2) . . . . ?
C1 C6 C14 O2 64.9(2) . . . . ?
C7 C6 C14 O2 -178.65(17) . . . . ?

_diffrn_measured_fraction_theta_max 0.996
_diffrn_reflns_theta_full        26.48
_diffrn_measured_fraction_theta_full 0.996
_refine_diff_density_max         0.261
_refine_diff_density_min         -0.269
_refine_diff_density_rms         0.062
