# Electronic Supplementary Material (ESI) for Chemical Science
# This journal is © The Royal Society of Chemistry 2011


data_global
_journal_name_full               'Chemical Science'

_journal_coden_Cambridge         1475

_publ_contact_author_name        'You, Shu-Li'
_publ_contact_author_email       slyou@mail.sioc.ac.cn

_publ_section_title              
;
Deracemization of Quaternary Stereocenters by Chiral
Phosphoric Acid-Catalyzed Friedel-Crafts Alkylation
Reaction of Indoles with Racemic Spiro Indolin-3-ones
;
loop_
_publ_author_name
'Shu-Li You'
'Qin Yin'

data_cd201665
_database_code_depnum_ccdc_archive 'CCDC 808591'
#TrackingRef 'cd201665.cif'

_audit_creation_method           SHELXL-97
_chemical_name_systematic        
;
?
;
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         ?
_chemical_formula_sum            'C19 H17 Br N2 O2'
_chemical_formula_weight         385.26

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'
N N 0.0061 0.0033 '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'

_symmetry_cell_setting           Orthorhombic
_symmetry_space_group_name_H-M   P2(1)2(1)2(1)

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

_cell_length_a                   7.8404(7)
_cell_length_b                   10.9935(10)
_cell_length_c                   20.0870(18)
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_volume                     1731.4(3)
_cell_formula_units_Z            4
_cell_measurement_temperature    293(2)
_cell_measurement_reflns_used    2430
_cell_measurement_theta_min      2.747
_cell_measurement_theta_max      20.258

_exptl_crystal_description       prismatic
_exptl_crystal_colour            colorless
_exptl_crystal_size_max          0.304
_exptl_crystal_size_mid          0.171
_exptl_crystal_size_min          0.156
_exptl_crystal_density_meas      ?
_exptl_crystal_density_diffrn    1.478
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             784
_exptl_absorpt_coefficient_mu    2.387
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_correction_T_min  0.5638
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_process_details   sadabs

_exptl_special_details           
;
?
;

_diffrn_ambient_temperature      293(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  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_detector_area_resol_mean ?
_diffrn_standards_number         ?
_diffrn_standards_interval_count ?
_diffrn_standards_interval_time  ?
_diffrn_standards_decay_%        ?
_diffrn_reflns_number            10420
_diffrn_reflns_av_R_equivalents  0.0324
_diffrn_reflns_av_sigmaI/netI    0.0591
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_theta_min         2.03
_diffrn_reflns_theta_max         27.50
_reflns_number_total             3934
_reflns_number_gt                2668
_reflns_threshold_expression     >2sigma(I)

_computing_data_collection       'Bruker SMART'
_computing_cell_refinement       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'

_refine_special_details          
;
Refinement of F^2^ against ALL reflections. The weighted R-factor wR and
goodness of fit S are based on F^2^, conventional R-factors R are based
on F, with F set to zero for negative F^2^. The threshold expression of
F^2^ > 2sigma(F^2^) is used only for calculating R-factors(gt) etc. and is
not relevant to the choice of reflections for refinement. R-factors based
on F^2^ 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/[\s^2^(Fo^2^)+(0.0436P)^2^+0.1905P] where P=(Fo^2^+2Fc^2^)/3'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_atom_sites_solution_hydrogens   geom
_refine_ls_hydrogen_treatment    mixed
_refine_ls_extinction_method     none
_refine_ls_extinction_coef       ?
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.005(11)
_chemical_absolute_configuration ad
_refine_ls_number_reflns         3934
_refine_ls_number_parameters     229
_refine_ls_number_restraints     3
_refine_ls_R_factor_all          0.0764
_refine_ls_R_factor_gt           0.0459
_refine_ls_wR_factor_ref         0.1173
_refine_ls_wR_factor_gt          0.1043
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_restrained_S_all      1.026
_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
Br1 Br 0.07206(9) -0.16099(5) -0.02844(3) 0.1185(3) Uani 1 1 d . . .
O1 O 0.4945(3) 0.2335(2) 0.14759(12) 0.0509(6) Uani 1 1 d . . .
O2 O 0.2560(3) 0.5764(2) 0.31955(17) 0.0778(9) Uani 1 1 d D . .
N1 N 0.0495(3) 0.2146(2) 0.17157(14) 0.0473(6) Uani 1 1 d D . .
N2 N 0.2935(4) -0.1301(3) 0.25444(17) 0.0648(9) Uani 1 1 d D . .
C1 C 0.3393(4) 0.2387(3) 0.14509(16) 0.0411(7) Uani 1 1 d . . .
C2 C 0.2175(3) 0.1844(3) 0.19862(15) 0.0392(7) Uani 1 1 d . . .
C3 C 0.0625(4) 0.2818(2) 0.11531(15) 0.0451(7) Uani 1 1 d . . .
C4 C 0.2339(4) 0.3014(3) 0.09798(15) 0.0437(7) Uani 1 1 d . . .
C5 C 0.2778(6) 0.3740(3) 0.04303(17) 0.0627(10) Uani 1 1 d . . .
H5 H 0.3914 0.3880 0.0321 0.075 Uiso 1 1 calc R . .
C6 C 0.1494(8) 0.4232(4) 0.0063(2) 0.0839(14) Uani 1 1 d . . .
H6 H 0.1745 0.4722 -0.0301 0.101 Uiso 1 1 calc R . .
C7 C -0.0212(7) 0.3999(4) 0.0234(2) 0.0831(13) Uani 1 1 d . . .
H7 H -0.1070 0.4335 -0.0028 0.100 Uiso 1 1 calc R . .
C8 C -0.0666(5) 0.3306(3) 0.07656(19) 0.0668(10) Uani 1 1 d . . .
H8 H -0.1807 0.3163 0.0866 0.080 Uiso 1 1 calc R . .
C9 C 0.2401(4) 0.0501(3) 0.20701(16) 0.0432(7) Uani 1 1 d . . .
C10 C 0.2929(5) -0.0082(3) 0.26324(18) 0.0544(9) Uani 1 1 d . . .
H10 H 0.3243 0.0307 0.3025 0.065 Uiso 1 1 calc R . .
C11 C 0.2420(4) -0.1562(3) 0.1917(2) 0.0548(9) Uani 1 1 d . . .
C12 C 0.2078(4) -0.0447(3) 0.15910(17) 0.0442(7) Uani 1 1 d . . .
C13 C 0.1550(4) -0.0450(3) 0.09319(18) 0.0516(8) Uani 1 1 d . . .
H13 H 0.1317 0.0269 0.0706 0.062 Uiso 1 1 calc R . .
C14 C 0.1386(4) -0.1553(4) 0.0629(2) 0.0654(10) Uani 1 1 d . . .
C15 C 0.1692(5) -0.2649(4) 0.0957(3) 0.0774(13) Uani 1 1 d . . .
H15 H 0.1534 -0.3379 0.0732 0.093 Uiso 1 1 calc R . .
C16 C 0.2214(5) -0.2666(3) 0.1598(3) 0.0698(11) Uani 1 1 d . . .
H16 H 0.2427 -0.3396 0.1817 0.084 Uiso 1 1 calc R . .
C17 C 0.2517(4) 0.2528(3) 0.26336(16) 0.0465(7) Uani 1 1 d . . .
H17A H 0.1732 0.2230 0.2969 0.056 Uiso 1 1 calc R . .
H17B H 0.3662 0.2334 0.2782 0.056 Uiso 1 1 calc R . .
C18 C 0.2351(5) 0.3891(3) 0.25976(17) 0.0495(8) Uani 1 1 d . . .
H18A H 0.3115 0.4200 0.2258 0.059 Uiso 1 1 calc R . .
H18B H 0.1194 0.4099 0.2469 0.059 Uiso 1 1 calc R . .
C19 C 0.2757(4) 0.4486(3) 0.32456(18) 0.0576(9) Uani 1 1 d . . .
H19A H 0.2005 0.4174 0.3589 0.069 Uiso 1 1 calc R . .
H19B H 0.3922 0.4296 0.3372 0.069 Uiso 1 1 calc R . .
H1 H -0.038(3) 0.173(3) 0.1798(15) 0.049(9) Uiso 1 1 d D . .
H2 H 0.341(4) -0.183(3) 0.2796(16) 0.070(12) Uiso 1 1 d D . .
H2A H 0.339(4) 0.611(4) 0.336(2) 0.101(17) Uiso 1 1 d D . .

loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_23
_atom_site_aniso_U_13
_atom_site_aniso_U_12
Br1 0.1425(5) 0.1078(4) 0.1052(4) -0.0523(3) -0.0469(4) 0.0240(4)
O1 0.0392(12) 0.0486(13) 0.0649(15) -0.0052(11) 0.0058(10) -0.0021(10)
O2 0.0517(15) 0.0592(18) 0.123(3) -0.0388(16) -0.0249(16) 0.0127(13)
N1 0.0352(14) 0.0398(15) 0.0669(18) 0.0025(13) -0.0049(13) 0.0008(11)
N2 0.075(2) 0.053(2) 0.066(2) 0.0218(16) 0.0013(17) 0.0068(16)
C1 0.0438(18) 0.0305(16) 0.0491(19) -0.0082(13) 0.0008(14) -0.0018(13)
C2 0.0366(15) 0.0374(16) 0.0437(17) 0.0030(13) -0.0017(12) -0.0033(12)
C3 0.0557(19) 0.0298(15) 0.0499(18) -0.0070(12) -0.0174(16) -0.0010(14)
C4 0.060(2) 0.0331(16) 0.0379(17) -0.0030(12) -0.0037(14) 0.0020(14)
C5 0.102(3) 0.044(2) 0.042(2) 0.0001(15) 0.0015(19) -0.0078(18)
C6 0.147(5) 0.059(3) 0.046(2) 0.0079(18) -0.016(3) 0.006(3)
C7 0.111(4) 0.071(3) 0.067(3) 0.001(2) -0.040(3) 0.012(3)
C8 0.073(2) 0.054(2) 0.073(2) -0.0047(19) -0.030(2) 0.008(2)
C9 0.0369(16) 0.0418(17) 0.0509(19) 0.0036(14) 0.0006(14) -0.0015(13)
C10 0.064(2) 0.047(2) 0.053(2) 0.0082(15) -0.0008(17) 0.0009(16)
C11 0.0433(17) 0.0369(17) 0.084(3) 0.0057(17) 0.0122(17) 0.0025(14)
C12 0.0350(15) 0.0363(17) 0.061(2) 0.0003(14) 0.0081(14) -0.0011(12)
C13 0.0418(17) 0.048(2) 0.065(2) -0.0089(16) 0.0034(16) 0.0015(15)
C14 0.053(2) 0.060(2) 0.083(3) -0.023(2) -0.0014(18) 0.0040(18)
C15 0.069(2) 0.043(2) 0.121(4) -0.027(2) 0.013(3) -0.0009(18)
C16 0.069(2) 0.043(2) 0.098(3) -0.003(2) 0.015(2) 0.0009(18)
C17 0.0476(17) 0.0457(18) 0.0463(18) -0.0010(14) 0.0012(15) -0.0022(15)
C18 0.0519(19) 0.0444(18) 0.052(2) -0.0081(14) 0.0016(16) 0.0032(15)
C19 0.0527(19) 0.062(2) 0.058(2) -0.0191(17) 0.0001(16) 0.0023(17)

_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
Br1 C14 1.908(4) . ?
O1 C1 1.219(3) . ?
O2 C19 1.417(4) . ?
O2 H2A 0.818(19) . ?
N1 C3 1.354(4) . ?
N1 C2 1.463(4) . ?
N1 H1 0.839(18) . ?
N2 C10 1.352(5) . ?
N2 C11 1.354(5) . ?
N2 H2 0.852(19) . ?
C1 C4 1.433(4) . ?
C1 C2 1.557(4) . ?
C2 C9 1.496(4) . ?
C2 C17 1.526(4) . ?
C3 C8 1.384(5) . ?
C3 C4 1.405(5) . ?
C4 C5 1.405(5) . ?
C5 C6 1.361(6) . ?
C5 H5 0.9300 . ?
C6 C7 1.404(7) . ?
C6 H6 0.9300 . ?
C7 C8 1.359(6) . ?
C7 H7 0.9300 . ?
C8 H8 0.9300 . ?
C9 C10 1.363(5) . ?
C9 C12 1.441(4) . ?
C10 H10 0.9300 . ?
C11 C16 1.383(5) . ?
C11 C12 1.416(5) . ?
C12 C13 1.387(5) . ?
C13 C14 1.363(5) . ?
C13 H13 0.9300 . ?
C14 C15 1.394(6) . ?
C15 C16 1.351(6) . ?
C15 H15 0.9300 . ?
C16 H16 0.9300 . ?
C17 C18 1.505(4) . ?
C17 H17A 0.9700 . ?
C17 H17B 0.9700 . ?
C18 C19 1.491(5) . ?
C18 H18A 0.9700 . ?
C18 H18B 0.9700 . ?
C19 H19A 0.9700 . ?
C19 H19B 0.9700 . ?

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
C19 O2 H2A 110(4) . . ?
C3 N1 C2 111.5(3) . . ?
C3 N1 H1 121(2) . . ?
C2 N1 H1 123(2) . . ?
C10 N2 C11 109.3(3) . . ?
C10 N2 H2 127(3) . . ?
C11 N2 H2 123(3) . . ?
O1 C1 C4 128.7(3) . . ?
O1 C1 C2 124.4(3) . . ?
C4 C1 C2 106.7(3) . . ?
N1 C2 C9 111.9(2) . . ?
N1 C2 C17 111.2(2) . . ?
C9 C2 C17 111.7(3) . . ?
N1 C2 C1 102.0(2) . . ?
C9 C2 C1 112.6(2) . . ?
C17 C2 C1 106.9(2) . . ?
N1 C3 C8 128.7(3) . . ?
N1 C3 C4 111.2(3) . . ?
C8 C3 C4 120.0(3) . . ?
C3 C4 C5 121.1(3) . . ?
C3 C4 C1 108.3(3) . . ?
C5 C4 C1 130.6(3) . . ?
C6 C5 C4 118.0(4) . . ?
C6 C5 H5 121.0 . . ?
C4 C5 H5 121.0 . . ?
C5 C6 C7 120.0(4) . . ?
C5 C6 H6 120.0 . . ?
C7 C6 H6 120.0 . . ?
C8 C7 C6 122.9(4) . . ?
C8 C7 H7 118.5 . . ?
C6 C7 H7 118.5 . . ?
C7 C8 C3 117.9(4) . . ?
C7 C8 H8 121.1 . . ?
C3 C8 H8 121.1 . . ?
C10 C9 C12 105.5(3) . . ?
C10 C9 C2 126.4(3) . . ?
C12 C9 C2 128.1(3) . . ?
N2 C10 C9 111.1(3) . . ?
N2 C10 H10 124.5 . . ?
C9 C10 H10 124.5 . . ?
N2 C11 C16 130.7(4) . . ?
N2 C11 C12 107.7(3) . . ?
C16 C11 C12 121.6(4) . . ?
C13 C12 C11 119.7(3) . . ?
C13 C12 C9 133.8(3) . . ?
C11 C12 C9 106.5(3) . . ?
C14 C13 C12 117.2(3) . . ?
C14 C13 H13 121.4 . . ?
C12 C13 H13 121.4 . . ?
C13 C14 C15 122.7(4) . . ?
C13 C14 Br1 119.0(3) . . ?
C15 C14 Br1 118.3(3) . . ?
C16 C15 C14 121.0(4) . . ?
C16 C15 H15 119.5 . . ?
C14 C15 H15 119.5 . . ?
C15 C16 C11 117.7(4) . . ?
C15 C16 H16 121.1 . . ?
C11 C16 H16 121.1 . . ?
C18 C17 C2 115.8(3) . . ?
C18 C17 H17A 108.3 . . ?
C2 C17 H17A 108.3 . . ?
C18 C17 H17B 108.3 . . ?
C2 C17 H17B 108.3 . . ?
H17A C17 H17B 107.4 . . ?
C19 C18 C17 112.1(3) . . ?
C19 C18 H18A 109.2 . . ?
C17 C18 H18A 109.2 . . ?
C19 C18 H18B 109.2 . . ?
C17 C18 H18B 109.2 . . ?
H18A C18 H18B 107.9 . . ?
O2 C19 C18 110.5(3) . . ?
O2 C19 H19A 109.6 . . ?
C18 C19 H19A 109.6 . . ?
O2 C19 H19B 109.6 . . ?
C18 C19 H19B 109.6 . . ?
H19A C19 H19B 108.1 . . ?

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
C3 N1 C2 C9 -124.3(3) . . . . ?
C3 N1 C2 C17 110.0(3) . . . . ?
C3 N1 C2 C1 -3.8(3) . . . . ?
O1 C1 C2 N1 -179.6(3) . . . . ?
C4 C1 C2 N1 4.9(3) . . . . ?
O1 C1 C2 C9 -59.5(4) . . . . ?
C4 C1 C2 C9 125.0(3) . . . . ?
O1 C1 C2 C17 63.5(4) . . . . ?
C4 C1 C2 C17 -112.0(3) . . . . ?
C2 N1 C3 C8 -178.0(3) . . . . ?
C2 N1 C3 C4 1.2(3) . . . . ?
N1 C3 C4 C5 -176.9(3) . . . . ?
C8 C3 C4 C5 2.4(4) . . . . ?
N1 C3 C4 C1 2.2(3) . . . . ?
C8 C3 C4 C1 -178.5(3) . . . . ?
O1 C1 C4 C3 -179.7(3) . . . . ?
C2 C1 C4 C3 -4.4(3) . . . . ?
O1 C1 C4 C5 -0.8(6) . . . . ?
C2 C1 C4 C5 174.5(3) . . . . ?
C3 C4 C5 C6 -1.1(5) . . . . ?
C1 C4 C5 C6 -179.9(3) . . . . ?
C4 C5 C6 C7 -0.6(6) . . . . ?
C5 C6 C7 C8 1.0(7) . . . . ?
C6 C7 C8 C3 0.3(6) . . . . ?
N1 C3 C8 C7 177.2(3) . . . . ?
C4 C3 C8 C7 -2.0(5) . . . . ?
N1 C2 C9 C10 -128.7(3) . . . . ?
C17 C2 C9 C10 -3.2(4) . . . . ?
C1 C2 C9 C10 117.1(3) . . . . ?
N1 C2 C9 C12 49.7(4) . . . . ?
C17 C2 C9 C12 175.2(3) . . . . ?
C1 C2 C9 C12 -64.5(4) . . . . ?
C11 N2 C10 C9 0.4(4) . . . . ?
C12 C9 C10 N2 -0.9(4) . . . . ?
C2 C9 C10 N2 177.8(3) . . . . ?
C10 N2 C11 C16 -179.6(4) . . . . ?
C10 N2 C11 C12 0.3(4) . . . . ?
N2 C11 C12 C13 179.0(3) . . . . ?
C16 C11 C12 C13 -1.1(5) . . . . ?
N2 C11 C12 C9 -0.8(3) . . . . ?
C16 C11 C12 C9 179.1(3) . . . . ?
C10 C9 C12 C13 -178.7(3) . . . . ?
C2 C9 C12 C13 2.6(5) . . . . ?
C10 C9 C12 C11 1.0(3) . . . . ?
C2 C9 C12 C11 -177.7(3) . . . . ?
C11 C12 C13 C14 0.0(4) . . . . ?
C9 C12 C13 C14 179.7(3) . . . . ?
C12 C13 C14 C15 1.4(5) . . . . ?
C12 C13 C14 Br1 -178.4(2) . . . . ?
C13 C14 C15 C16 -1.7(6) . . . . ?
Br1 C14 C15 C16 178.1(3) . . . . ?
C14 C15 C16 C11 0.5(6) . . . . ?
N2 C11 C16 C15 -179.3(4) . . . . ?
C12 C11 C16 C15 0.8(5) . . . . ?
N1 C2 C17 C18 -55.2(4) . . . . ?
C9 C2 C17 C18 179.0(3) . . . . ?
C1 C2 C17 C18 55.5(4) . . . . ?
C2 C17 C18 C19 -178.2(3) . . . . ?
C17 C18 C19 O2 -179.0(3) . . . . ?

loop_
_geom_hbond_atom_site_label_D
_geom_hbond_atom_site_label_H
_geom_hbond_atom_site_label_A
_geom_hbond_distance_DH
_geom_hbond_distance_HA
_geom_hbond_distance_DA
_geom_hbond_angle_DHA
_geom_hbond_site_symmetry_A
N2 H2 O1 0.852(19) 2.16(2) 2.981(4) 162(4) 3_645
N1 H1 O2 0.839(18) 2.014(19) 2.842(4) 169(3) 3_545
O2 H2A O1 0.818(19) 1.91(3) 2.692(4) 160(5) 3_655

_diffrn_measured_fraction_theta_max 0.997
_diffrn_reflns_theta_full        27.50
_diffrn_measured_fraction_theta_full 0.997
_refine_diff_density_max         0.506
_refine_diff_density_min         -0.289
_refine_diff_density_rms         0.046