# Electronic Supplementary Material (ESI) for RSC Advances.
# This journal is © The Royal Society of Chemistry 2016

####################################################################### 
# 
# 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_Mura1_0m_a
_database_code_depnum_ccdc_archive 'CCDC 1439654'
_audit_update_record             
;
2015-11-30 deposited with the CCDC.
2016-01-27 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-2014/7
_shelx_SHELXL_version_number     2014/7
_chemical_name_systematic        'Phosphonoselenoic acid ester'
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         ?
_chemical_formula_sum            'C24 H21 O2 P Se'
_chemical_formula_weight         451.34

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'
P P 0.1023 0.0942 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Se Se -0.0929 2.2259 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_H-M_alt        'P 21 21 21'
_space_group_name_Hall           'P 2ac 2ab'

_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, z+1/2'
'x+1/2, -y+1/2, -z'
'-x, y+1/2, -z+1/2'

_cell_length_a                   7.4584(3)
_cell_length_b                   8.9425(4)
_cell_length_c                   31.2167(13)
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_volume                     2082.05(15)
_cell_formula_units_Z            4
_cell_measurement_temperature    90(2)
_cell_measurement_reflns_used    9988
_cell_measurement_theta_min      2.37
_cell_measurement_theta_max      27.55

_exptl_crystal_description       plate
_exptl_crystal_colour            colorless
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_density_diffrn    1.440
_exptl_crystal_F_000             920
_exptl_transmission_factor_min   ?
_exptl_transmission_factor_max   ?
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.100
_exptl_absorpt_coefficient_mu    1.897
_shelx_estimated_absorpt_T_min   0.703
_shelx_estimated_absorpt_T_max   0.833
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_correction_T_min  0.6158
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_process_details   SADABS
_exptl_absorpt_special_details   ?
_diffrn_ambient_temperature      90(2)
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_type           MoK\a
_diffrn_source                   ?
_diffrn_measurement_device_type  'Bruker CMOS'
_diffrn_measurement_method       'φ and ω scans'
_diffrn_detector_area_resol_mean 10.42
_diffrn_reflns_number            58681
_diffrn_reflns_av_unetI/netI     0.0295
_diffrn_reflns_av_R_equivalents  0.0531
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_l_min       -40
_diffrn_reflns_limit_l_max       40
_diffrn_reflns_theta_min         2.369
_diffrn_reflns_theta_max         27.484
_diffrn_reflns_theta_full        25.242
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measured_fraction_theta_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_point_group_measured_fraction_full 0.993
_reflns_number_total             4756
_reflns_number_gt                4659
_reflns_threshold_expression     'I > 2σ(I)'
_reflns_Friedel_coverage         0.726
_reflns_Friedel_fraction_max     0.987
_reflns_Friedel_fraction_full    0.986

_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       'Bruker APEX2'
_computing_cell_refinement       'Bruker SAINT'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_computing_structure_refinement  'SHELXL-2014 (Sheldrick 2014)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_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)+(0.0208P)²+1.8626P] 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_abs_structure_details 
;
 Flack x determined using 1911 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.093(4)
_chemical_absolute_configuration rm
_refine_ls_number_reflns         4756
_refine_ls_number_parameters     255
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0255
_refine_ls_R_factor_gt           0.0248
_refine_ls_wR_factor_ref         0.0664
_refine_ls_wR_factor_gt          0.0662
_refine_ls_goodness_of_fit_ref   1.136
_refine_ls_restrained_S_all      1.136
_refine_ls_shift/su_max          0.001
_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
P1 P 0.54779(10) 0.60628(8) 0.65318(2) 0.01146(15) Uani 1 1 d . . . . .
Se1 Se 0.64999(4) 0.78084(4) 0.68908(2) 0.01759(9) Uani 1 1 d . . . . .
O1 O 0.6629(3) 0.5910(2) 0.60950(6) 0.0110(4) Uani 1 1 d . . . . .
O2 O 0.5571(3) 0.4401(2) 0.67285(7) 0.0141(4) Uani 1 1 d . . . . .
C1 C 0.6417(4) 0.4629(3) 0.58375(8) 0.0103(5) Uani 1 1 d . . . . .
C2 C 0.7103(4) 0.3283(3) 0.59726(9) 0.0101(5) Uani 1 1 d . . . . .
C3 C 0.6761(4) 0.1997(3) 0.57084(8) 0.0098(5) Uani 1 1 d . . . . .
C4 C 0.7196(4) 0.0520(3) 0.58388(9) 0.0120(6) Uani 1 1 d . . . . .
H1 H 0.7786 0.0367 0.6105 0.014 Uiso 1 1 calc R U . . .
C5 C 0.6781(4) -0.0687(3) 0.55885(10) 0.0159(6) Uani 1 1 d . . . . .
H2 H 0.7085 -0.1664 0.5683 0.019 Uiso 1 1 calc R U . . .
C6 C 0.5907(4) -0.0495(4) 0.51912(11) 0.0178(6) Uani 1 1 d . . . . .
H3 H 0.5639 -0.1339 0.5018 0.021 Uiso 1 1 calc R U . . .
C7 C 0.5446(4) 0.0902(4) 0.50570(9) 0.0159(6) Uani 1 1 d . . . . .
H4 H 0.4847 0.1022 0.4791 0.019 Uiso 1 1 calc R U . . .
C8 C 0.5847(4) 0.2183(4) 0.53083(9) 0.0125(5) Uani 1 1 d . . . . .
C9 C 0.5286(4) 0.3633(4) 0.51810(9) 0.0145(6) Uani 1 1 d . . . . .
H5 H 0.4721 0.3767 0.4911 0.017 Uiso 1 1 calc R U . . .
C10 C 0.5550(4) 0.4836(3) 0.54416(10) 0.0139(6) Uani 1 1 d . . . . .
H6 H 0.5153 0.5802 0.5357 0.017 Uiso 1 1 calc R U . . .
C11 C 0.7251(4) 0.3702(3) 0.67590(9) 0.0123(6) Uani 1 1 d . . . . .
C12 C 0.8054(4) 0.3167(3) 0.63929(9) 0.0099(5) Uani 1 1 d . . . . .
C13 C 0.9809(4) 0.2532(3) 0.64348(9) 0.0098(5) Uani 1 1 d . . . . .
C14 C 1.0853(4) 0.2098(4) 0.60753(9) 0.0116(5) Uani 1 1 d . . . . .
H7 H 1.0381 0.2224 0.5795 0.014 Uiso 1 1 calc R U . . .
C15 C 1.2532(4) 0.1499(4) 0.61264(10) 0.0143(6) Uani 1 1 d . . . . .
H8 H 1.3206 0.1216 0.5881 0.017 Uiso 1 1 calc R U . . .
C16 C 1.3271(4) 0.1299(3) 0.65380(10) 0.0165(6) Uani 1 1 d . . . . .
H9 H 1.4431 0.0874 0.6570 0.020 Uiso 1 1 calc R U . . .
C17 C 1.2310(4) 0.1719(3) 0.68907(11) 0.0172(6) Uani 1 1 d . . . . .
H10 H 1.2813 0.1587 0.7168 0.021 Uiso 1 1 calc R U . . .
C18 C 1.0571(4) 0.2349(3) 0.68496(9) 0.0135(5) Uani 1 1 d . . . . .
C19 C 0.9614(5) 0.2844(4) 0.72158(9) 0.0186(6) Uani 1 1 d . . . . .
H11 H 1.0106 0.2699 0.7493 0.022 Uiso 1 1 calc R U . . .
C20 C 0.7976(4) 0.3534(4) 0.71707(10) 0.0175(6) Uani 1 1 d . . . . .
H12 H 0.7346 0.3892 0.7415 0.021 Uiso 1 1 calc R U . . .
C21 C 0.3114(4) 0.6121(3) 0.63879(10) 0.0144(6) Uani 1 1 d . . . . .
H13 H 0.2818 0.5185 0.6227 0.017 Uiso 1 1 calc R U . . .
C22 C 0.2752(4) 0.7450(4) 0.60957(11) 0.0199(7) Uani 1 1 d . . . . .
H14 H 0.3577 0.7406 0.5848 0.024 Uiso 1 1 calc R U . . .
H15 H 0.3002 0.8386 0.6254 0.024 Uiso 1 1 calc R U . . .
C23 C 0.0825(5) 0.7481(5) 0.59338(12) 0.0283(9) Uani 1 1 d . . . . .
H16 H 0.0556 0.6539 0.5787 0.042 Uiso 1 1 calc R U . . .
H17 H 0.0674 0.8316 0.5734 0.042 Uiso 1 1 calc R U . . .
H18 H 0.0006 0.7607 0.6177 0.042 Uiso 1 1 calc R U . . .
C24 C 0.1999(5) 0.6149(4) 0.67988(11) 0.0236(7) Uani 1 1 d . . . . .
H19 H 0.2164 0.7112 0.6944 0.035 Uiso 1 1 calc R U . . .
H20 H 0.2388 0.5339 0.6988 0.035 Uiso 1 1 calc R U . . .
H21 H 0.0729 0.6016 0.6728 0.035 Uiso 1 1 calc R U . . .


_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
P1 O2 1.609(2) . ?
P1 O1 1.617(2) . ?
P1 C21 1.820(3) . ?
P1 Se1 2.0673(8) . ?
O1 C1 1.408(3) . ?
O2 C11 1.404(4) . ?
C1 C2 1.374(4) . ?
C1 C10 1.407(4) . ?
C2 C3 1.438(4) . ?
C2 C12 1.495(4) . ?
C3 C4 1.420(4) . ?
C3 C8 1.433(4) . ?
C4 C5 1.368(4) . ?
C4 H1 0.9500 . ?
C5 C6 1.412(4) . ?
C5 H2 0.9500 . ?
C6 C7 1.361(5) . ?
C6 H3 0.9500 . ?
C7 C8 1.421(4) . ?
C7 H4 0.9500 . ?
C8 C9 1.419(4) . ?
C9 C10 1.363(4) . ?
C9 H5 0.9500 . ?
C10 H6 0.9500 . ?
C11 C12 1.376(4) . ?
C11 C20 1.402(4) . ?
C12 C13 1.433(4) . ?
C13 C14 1.420(4) . ?
C13 C18 1.424(4) . ?
C14 C15 1.371(4) . ?
C14 H7 0.9500 . ?
C15 C16 1.410(4) . ?
C15 H8 0.9500 . ?
C16 C17 1.366(5) . ?
C16 H9 0.9500 . ?
C17 C18 1.420(4) . ?
C17 H10 0.9500 . ?
C18 C19 1.419(4) . ?
C19 C20 1.376(5) . ?
C19 H11 0.9500 . ?
C20 H12 0.9500 . ?
C21 C22 1.522(4) . ?
C21 C24 1.529(4) . ?
C21 H13 1.0000 . ?
C22 C23 1.524(5) . ?
C22 H14 0.9900 . ?
C22 H15 0.9900 . ?
C23 H16 0.9800 . ?
C23 H17 0.9800 . ?
C23 H18 0.9800 . ?
C24 H19 0.9800 . ?
C24 H20 0.9800 . ?
C24 H21 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
O2 P1 O1 102.76(11) . . ?
O2 P1 C21 99.33(13) . . ?
O1 P1 C21 107.98(13) . . ?
O2 P1 Se1 118.32(9) . . ?
O1 P1 Se1 108.98(8) . . ?
C21 P1 Se1 118.00(10) . . ?
C1 O1 P1 119.38(19) . . ?
C11 O2 P1 118.40(19) . . ?
C2 C1 C10 123.8(3) . . ?
C2 C1 O1 119.7(2) . . ?
C10 C1 O1 116.5(3) . . ?
C1 C2 C3 117.3(3) . . ?
C1 C2 C12 120.5(3) . . ?
C3 C2 C12 122.1(2) . . ?
C4 C3 C8 117.8(3) . . ?
C4 C3 C2 122.6(3) . . ?
C8 C3 C2 119.4(3) . . ?
C5 C4 C3 121.2(3) . . ?
C5 C4 H1 119.4 . . ?
C3 C4 H1 119.4 . . ?
C4 C5 C6 120.7(3) . . ?
C4 C5 H2 119.6 . . ?
C6 C5 H2 119.6 . . ?
C7 C6 C5 119.9(3) . . ?
C7 C6 H3 120.1 . . ?
C5 C6 H3 120.1 . . ?
C6 C7 C8 121.1(3) . . ?
C6 C7 H4 119.4 . . ?
C8 C7 H4 119.4 . . ?
C9 C8 C7 121.4(3) . . ?
C9 C8 C3 119.4(3) . . ?
C7 C8 C3 119.2(3) . . ?
C10 C9 C8 120.8(3) . . ?
C10 C9 H5 119.6 . . ?
C8 C9 H5 119.6 . . ?
C9 C10 C1 119.1(3) . . ?
C9 C10 H6 120.5 . . ?
C1 C10 H6 120.5 . . ?
C12 C11 C20 123.8(3) . . ?
C12 C11 O2 119.1(3) . . ?
C20 C11 O2 117.0(3) . . ?
C11 C12 C13 117.4(2) . . ?
C11 C12 C2 119.9(3) . . ?
C13 C12 C2 122.7(2) . . ?
C14 C13 C18 117.9(3) . . ?
C14 C13 C12 122.5(2) . . ?
C18 C13 C12 119.6(3) . . ?
C15 C14 C13 121.0(3) . . ?
C15 C14 H7 119.5 . . ?
C13 C14 H7 119.5 . . ?
C14 C15 C16 120.8(3) . . ?
C14 C15 H8 119.6 . . ?
C16 C15 H8 119.6 . . ?
C17 C16 C15 119.6(3) . . ?
C17 C16 H9 120.2 . . ?
C15 C16 H9 120.2 . . ?
C16 C17 C18 121.0(3) . . ?
C16 C17 H10 119.5 . . ?
C18 C17 H10 119.5 . . ?
C19 C18 C17 120.7(3) . . ?
C19 C18 C13 119.7(3) . . ?
C17 C18 C13 119.5(3) . . ?
C20 C19 C18 120.3(3) . . ?
C20 C19 H11 119.8 . . ?
C18 C19 H11 119.8 . . ?
C19 C20 C11 118.9(3) . . ?
C19 C20 H12 120.5 . . ?
C11 C20 H12 120.5 . . ?
C22 C21 C24 113.2(3) . . ?
C22 C21 P1 110.0(2) . . ?
C24 C21 P1 108.7(2) . . ?
C22 C21 H13 108.3 . . ?
C24 C21 H13 108.3 . . ?
P1 C21 H13 108.3 . . ?
C21 C22 C23 112.3(3) . . ?
C21 C22 H14 109.1 . . ?
C23 C22 H14 109.1 . . ?
C21 C22 H15 109.1 . . ?
C23 C22 H15 109.1 . . ?
H14 C22 H15 107.9 . . ?
C22 C23 H16 109.5 . . ?
C22 C23 H17 109.5 . . ?
H16 C23 H17 109.5 . . ?
C22 C23 H18 109.5 . . ?
H16 C23 H18 109.5 . . ?
H17 C23 H18 109.5 . . ?
C21 C24 H19 109.5 . . ?
C21 C24 H20 109.5 . . ?
H19 C24 H20 109.5 . . ?
C21 C24 H21 109.5 . . ?
H19 C24 H21 109.5 . . ?
H20 C24 H21 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
O2 P1 O1 C1 41.5(2) . . . . ?
C21 P1 O1 C1 -62.9(2) . . . . ?
Se1 P1 O1 C1 167.81(19) . . . . ?
O1 P1 O2 C11 49.3(2) . . . . ?
C21 P1 O2 C11 160.3(2) . . . . ?
Se1 P1 O2 C11 -70.8(2) . . . . ?
P1 O1 C1 C2 -72.3(3) . . . . ?
P1 O1 C1 C10 110.0(3) . . . . ?
C10 C1 C2 C3 -5.8(5) . . . . ?
O1 C1 C2 C3 176.6(3) . . . . ?
C10 C1 C2 C12 178.2(3) . . . . ?
O1 C1 C2 C12 0.7(4) . . . . ?
C1 C2 C3 C4 -171.8(3) . . . . ?
C12 C2 C3 C4 4.1(4) . . . . ?
C1 C2 C3 C8 4.2(4) . . . . ?
C12 C2 C3 C8 -179.8(2) . . . . ?
C8 C3 C4 C5 1.0(4) . . . . ?
C2 C3 C4 C5 177.0(3) . . . . ?
C3 C4 C5 C6 0.1(5) . . . . ?
C4 C5 C6 C7 -0.9(5) . . . . ?
C5 C6 C7 C8 0.7(5) . . . . ?
C6 C7 C8 C9 -176.6(3) . . . . ?
C6 C7 C8 C3 0.4(5) . . . . ?
C4 C3 C8 C9 175.9(3) . . . . ?
C2 C3 C8 C9 -0.3(4) . . . . ?
C4 C3 C8 C7 -1.2(4) . . . . ?
C2 C3 C8 C7 -177.4(3) . . . . ?
C7 C8 C9 C10 174.6(3) . . . . ?
C3 C8 C9 C10 -2.4(4) . . . . ?
C8 C9 C10 C1 1.1(5) . . . . ?
C2 C1 C10 C9 3.2(5) . . . . ?
O1 C1 C10 C9 -179.2(3) . . . . ?
P1 O2 C11 C12 -74.2(3) . . . . ?
P1 O2 C11 C20 108.5(3) . . . . ?
C20 C11 C12 C13 -6.1(4) . . . . ?
O2 C11 C12 C13 176.8(2) . . . . ?
C20 C11 C12 C2 174.7(3) . . . . ?
O2 C11 C12 C2 -2.4(4) . . . . ?
C1 C2 C12 C11 51.6(4) . . . . ?
C3 C2 C12 C11 -124.1(3) . . . . ?
C1 C2 C12 C13 -127.5(3) . . . . ?
C3 C2 C12 C13 56.7(4) . . . . ?
C11 C12 C13 C14 -172.8(3) . . . . ?
C2 C12 C13 C14 6.4(4) . . . . ?
C11 C12 C13 C18 5.9(4) . . . . ?
C2 C12 C13 C18 -175.0(3) . . . . ?
C18 C13 C14 C15 1.0(4) . . . . ?
C12 C13 C14 C15 179.7(3) . . . . ?
C13 C14 C15 C16 -0.1(5) . . . . ?
C14 C15 C16 C17 -0.6(5) . . . . ?
C15 C16 C17 C18 0.3(5) . . . . ?
C16 C17 C18 C19 -177.1(3) . . . . ?
C16 C17 C18 C13 0.7(4) . . . . ?
C14 C13 C18 C19 176.5(3) . . . . ?
C12 C13 C18 C19 -2.2(4) . . . . ?
C14 C13 C18 C17 -1.3(4) . . . . ?
C12 C13 C18 C17 180.0(3) . . . . ?
C17 C18 C19 C20 176.1(3) . . . . ?
C13 C18 C19 C20 -1.7(5) . . . . ?
C18 C19 C20 C11 1.7(5) . . . . ?
C12 C11 C20 C19 2.3(5) . . . . ?
O2 C11 C20 C19 179.5(3) . . . . ?
O2 P1 C21 C22 -166.5(2) . . . . ?
O1 P1 C21 C22 -59.7(2) . . . . ?
Se1 P1 C21 C22 64.3(2) . . . . ?
O2 P1 C21 C24 69.1(2) . . . . ?
O1 P1 C21 C24 175.9(2) . . . . ?
Se1 P1 C21 C24 -60.1(2) . . . . ?
C24 C21 C22 C23 -63.1(4) . . . . ?
P1 C21 C22 C23 175.1(2) . . . . ?

_refine_diff_density_max         0.512
_refine_diff_density_min         -0.363
_refine_diff_density_rms         0.079

