# Electronic Supplementary Material (ESI) for ChemComm.
# This journal is © The Royal Society of Chemistry 2019

####################################################################### 
# 
# 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_aty_3a
_database_code_depnum_ccdc_archive 'CCDC 1845126'
loop_
_audit_author_name
_audit_author_address
'Taeyang An'
;Seoul National University
South Korea
;
_audit_update_record             
;
2018-05-24 deposited with the CCDC.	2019-07-23 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-2014/7
_shelx_SHELXL_version_number     2014/7
_chemical_name_systematic        
1,1'-((butylimino)methylene)bis(pyrrolidine-2,5-dione)
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         C13H17N3O4
_chemical_formula_sum            'C13 H17 N3 O4'
_chemical_formula_weight         279.29

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'
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'

_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                   9.69440(10)
_cell_length_b                   8.73060(10)
_cell_length_c                   16.4787(2)
_cell_angle_alpha                90
_cell_angle_beta                 94.1674(8)
_cell_angle_gamma                90
_cell_volume                     1391.04(3)
_cell_formula_units_Z            4
_cell_measurement_temperature    173(2)
_cell_measurement_reflns_used    4115
_cell_measurement_theta_min      2.37
_cell_measurement_theta_max      28.24

_exptl_crystal_description       Block
_exptl_crystal_colour            colourless
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_density_diffrn    1.334
_exptl_crystal_F_000             592
_exptl_transmission_factor_min   ?
_exptl_transmission_factor_max   ?
_exptl_crystal_size_max          0.309
_exptl_crystal_size_mid          0.215
_exptl_crystal_size_min          0.140
_exptl_absorpt_coefficient_mu    0.100
_shelx_estimated_absorpt_T_min   ?
_shelx_estimated_absorpt_T_max   ?
_exptl_absorpt_correction_type   Multi-scan
_exptl_absorpt_correction_T_min  0.7011
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2014)'
_exptl_absorpt_special_details   ?
_diffrn_ambient_temperature      173(2)
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_type           MoK\a
_diffrn_source                   ?
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'φ and ω scans'
_diffrn_detector_area_resol_mean ?
_diffrn_reflns_number            13751
_diffrn_reflns_av_unetI/netI     0.0632
_diffrn_reflns_av_R_equivalents  0.1023
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_theta_min         2.365
_diffrn_reflns_theta_max         28.297
_diffrn_reflns_theta_full        25.242
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measured_fraction_theta_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_point_group_measured_fraction_full 1.000
_reflns_number_total             3451
_reflns_number_gt                2598
_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       'Bruker APEX2'
_computing_cell_refinement       'Bruker SAINT'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_computing_structure_refinement  'SHELXL-2014/7 (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)+(0.0820P)²] 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         3451
_refine_ls_number_parameters     181
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0650
_refine_ls_R_factor_gt           0.0525
_refine_ls_wR_factor_ref         0.1472
_refine_ls_wR_factor_gt          0.1386
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_restrained_S_all      1.034
_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
O1 O 0.53839(11) 0.48881(11) 0.11976(6) 0.0385(3) Uani 1 1 d . . . . .
O2 O 0.11984(11) 0.32212(13) 0.00789(7) 0.0450(3) Uani 1 1 d . . . . .
O3 O 0.22141(11) -0.03778(12) 0.02602(6) 0.0398(3) Uani 1 1 d . . . . .
O4 O 0.22765(12) 0.30426(15) 0.23459(6) 0.0487(3) Uani 1 1 d . . . . .
N1 N 0.33641(11) 0.36939(12) 0.06939(6) 0.0244(3) Uani 1 1 d . . . . .
N2 N 0.25499(11) 0.14150(13) 0.12776(6) 0.0247(3) Uani 1 1 d . . . . .
N3 N 0.48593(11) 0.16293(13) 0.08559(6) 0.0259(3) Uani 1 1 d . . . . .
C1 C 0.42340(15) 0.49661(14) 0.08676(7) 0.0265(3) Uani 1 1 d . . . . .
C2 C 0.34510(15) 0.63749(16) 0.05920(8) 0.0322(3) Uani 1 1 d . . . . .
H2A H 0.4008 0.7010 0.0240 0.039 Uiso 1 1 calc R U . . .
H2B H 0.3216 0.6996 0.1065 0.039 Uiso 1 1 calc R U . . .
C3 C 0.21519(16) 0.58103(17) 0.01214(9) 0.0385(4) Uani 1 1 d . . . . .
H3A H 0.1324 0.6318 0.0316 0.046 Uiso 1 1 calc R U . . .
H3B H 0.2190 0.6022 -0.0467 0.046 Uiso 1 1 calc R U . . .
C4 C 0.21054(14) 0.41135(17) 0.02748(8) 0.0307(3) Uani 1 1 d . . . . .
C5 C 0.18260(15) 0.02287(16) 0.08571(8) 0.0294(3) Uani 1 1 d . . . . .
C6 C 0.05523(17) -0.00910(19) 0.12912(10) 0.0422(4) Uani 1 1 d . . . . .
H6A H 0.0594 -0.1130 0.1533 0.051 Uiso 1 1 calc R U . . .
H6B H -0.0284 -0.0017 0.0911 0.051 Uiso 1 1 calc R U . . .
C7 C 0.05260(18) 0.1110(3) 0.19467(9) 0.0529(5) Uani 1 1 d . . . . .
H7A H -0.0282 0.1794 0.1843 0.064 Uiso 1 1 calc R U . . .
H7B H 0.0473 0.0625 0.2486 0.064 Uiso 1 1 calc R U . . .
C8 C 0.18511(15) 0.19984(19) 0.19166(8) 0.0356(4) Uani 1 1 d . . . . .
C9 C 0.36903(13) 0.21706(14) 0.09454(7) 0.0221(3) Uani 1 1 d . . . . .
C10 C 0.52597(15) 0.01261(15) 0.11787(8) 0.0306(3) Uani 1 1 d . . . . .
H10A H 0.5352 -0.0604 0.0726 0.037 Uiso 1 1 calc R U . . .
H10B H 0.4542 -0.0266 0.1522 0.037 Uiso 1 1 calc R U . . .
C11 C 0.66320(16) 0.0271(2) 0.16816(10) 0.0419(4) Uani 1 1 d . . . . .
H11A H 0.6952 -0.0765 0.1851 0.050 Uiso 1 1 calc R U . . .
H11B H 0.7326 0.0707 0.1335 0.050 Uiso 1 1 calc R U . . .
C12 C 0.65707(19) 0.1262(2) 0.24330(10) 0.0498(5) Uani 1 1 d . . . . .
H12A H 0.7511 0.1337 0.2708 0.060 Uiso 1 1 calc R U . . .
H12B H 0.6279 0.2307 0.2263 0.060 Uiso 1 1 calc R U . . .
C13 C 0.5599(2) 0.0671(3) 0.30310(10) 0.0704(6) Uani 1 1 d . . . . .
H13A H 0.5611 0.1364 0.3500 0.106 Uiso 1 1 calc R U . . .
H13B H 0.4660 0.0619 0.2769 0.106 Uiso 1 1 calc R U . . .
H13C H 0.5893 -0.0353 0.3215 0.106 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
O1 C1 1.2062(16) . ?
O2 C4 1.2012(17) . ?
O3 C5 1.2014(17) . ?
O4 C8 1.2080(18) . ?
N1 C4 1.4063(16) . ?
N1 C1 1.4112(17) . ?
N1 C9 1.4218(16) . ?
N2 C8 1.3895(17) . ?
N2 C5 1.4052(17) . ?
N2 C9 1.4300(16) . ?
N3 C9 1.2465(16) . ?
N3 C10 1.4581(16) . ?
C1 C2 1.4983(19) . ?
C2 C3 1.513(2) . ?
C3 C4 1.504(2) . ?
C5 C6 1.498(2) . ?
C6 C7 1.507(2) . ?
C7 C8 1.504(2) . ?
C10 C11 1.5207(19) . ?
C11 C12 1.515(2) . ?
C12 C13 1.503(3) . ?

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
C4 N1 C1 112.27(11) . . ?
C4 N1 C9 123.60(11) . . ?
C1 N1 C9 124.06(10) . . ?
C8 N2 C5 112.97(12) . . ?
C8 N2 C9 123.65(12) . . ?
C5 N2 C9 121.57(10) . . ?
C9 N3 C10 121.21(12) . . ?
O1 C1 N1 124.48(12) . . ?
O1 C1 C2 127.89(12) . . ?
N1 C1 C2 107.61(11) . . ?
C1 C2 C3 105.81(11) . . ?
C4 C3 C2 105.59(11) . . ?
O2 C4 N1 123.72(13) . . ?
O2 C4 C3 128.60(12) . . ?
N1 C4 C3 107.67(11) . . ?
O3 C5 N2 123.62(13) . . ?
O3 C5 C6 128.84(13) . . ?
N2 C5 C6 107.54(12) . . ?
C5 C6 C7 105.67(12) . . ?
C8 C7 C6 106.03(13) . . ?
O4 C8 N2 123.77(14) . . ?
O4 C8 C7 128.73(14) . . ?
N2 C8 C7 107.50(13) . . ?
N3 C9 N1 120.33(12) . . ?
N3 C9 N2 127.25(12) . . ?
N1 C9 N2 112.42(10) . . ?
N3 C10 C11 108.84(12) . . ?
C12 C11 C10 114.09(13) . . ?
C13 C12 C11 113.80(15) . . ?

_refine_diff_density_max         0.240
_refine_diff_density_min         -0.362
_refine_diff_density_rms         0.069


_exptl_crystal_recrystallization_method 
'Re-crystallisation from solvent: Dichloromethane/Hexane'
