Discovery and exploration of new solid forms of dipeptide: l-alanyl-l-glutamine
Fu, Jinqiu; Cai, Mengyang; Shi, Yuzhong; Hou, Yihang; Guo, Rongxi; Wang, Chiyi; Zhao, Jingjing; Zhuang, Wei; Ying, Hanjie; Yang, Pengpeng; Zhang, Keke; CrystEngComm 26 (2024) 943–950; doi:10.1039/D3CE00957B

data_7247953
_publ_section_title
;
 Discovery and exploration of new solid forms of dipeptide:
 l-alanyl-l-glutamine
;
_journal_issue                   7
_journal_name_full               CrystEngComm
_journal_page_first              943
_journal_page_last               950
_journal_paper_doi               10.1039/D3CE00957B
_journal_volume                  26
_journal_year                    2024
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C8 H15 N3 O4'
_chemical_formula_sum            'C8 H15 N3 O4'
_chemical_formula_weight         217.23
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2022-10-13
_audit_creation_method
;
Olex2 1.5
(compiled 2022.04.07 svn.rca3783a0 for OlexSys, GUI svn.r6498)
;
_audit_update_record
;
2023-11-10 deposited with the CCDC.	2024-01-03 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.0339(2)
_cell_length_b                   16.1821(8)
_cell_length_c                   16.2812(7)
_cell_measurement_reflns_used    9932
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      71.887
_cell_measurement_theta_min      3.852
_cell_volume                     1326.25(10)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_collection       'SAINT V8.40B (?, 2016)'
_computing_data_reduction        'SAINT V8.40B (?, 2016)'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      200.00
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0600
_diffrn_reflns_av_unetI/netI     0.0407
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            14722
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         72.327
_diffrn_reflns_theta_min         3.851
_diffrn_source_current           1.2
_diffrn_source_power             0.06
_diffrn_source_voltage           50.0
_exptl_absorpt_coefficient_mu    0.743
_exptl_absorpt_correction_T_max  0.7536
_exptl_absorpt_correction_T_min  0.5220
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1820 before and 0.1077 after correction.
The Ratio of minimum to maximum transmission is 0.6927.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.088
_exptl_crystal_description       block
_exptl_crystal_F_000             464
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.220
_refine_diff_density_min         -0.236
_refine_diff_density_rms         0.057
_refine_ls_abs_structure_details
;
 Flack x determined using 917 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.25(11)
_refine_ls_extinction_coef       0.0100(14)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     143
_refine_ls_number_reflns         2596
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0440
_refine_ls_R_factor_gt           0.0408
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0615P)^2^+0.1396P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1029
_refine_ls_wR_factor_ref         0.1062
_reflns_Friedel_coverage         0.684
_reflns_Friedel_fraction_full    0.998
_reflns_Friedel_fraction_max     0.991
_reflns_number_gt                2394
_reflns_number_total             2596
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d3ce00957b2.cif
_cod_data_source_block           35346_f1_0m_a
_cod_depositor_comments
'Adding full bibliography for 7247952--7247957.cif.'
_cod_database_code               7247953
_shelx_shelxl_version_number     2018/3
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H,H) groups, All N(H,H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Restrained distances
 N2-H2
 0.9 with sigma of 0.01
3.a Ternary CH refined with riding coordinates:
 C4(H4), C7(H7)
3.b Secondary CH2 refined with riding coordinates:
 C2(H2A,H2B), C3(H3D,H3E)
3.c X=CH2 refined with riding coordinates:
 N1(H1A,H1B)
3.d Idealised Me refined as rotating group:
 N3(H3A,H3B,H3C), C8(H8A,H8B,H8C)
;
_smtbx_masks_void_probe_radius   1.2
_smtbx_masks_void_truncation_radius 1.2
_shelx_res_checksum              22418
_shelx_fab_checksum              66764
_olex2_submission_special_instructions 'No special instructions were received'