New polymorphic phase of arachidic acid crystal: structure, intermolecular interactions, low-temperature stability and Raman spectroscopy combined with DFT calculations
Cardoso, Luanny M. B.; de Oliveira Neto, João G.; Saraiva, Gilberto D.; Leite, Fábio F.; Ayala, Alejandro P.; dos Santos, Adenilson O.; de Sousa, Francisco F.; RSC Advances 13 (2023) 34032–34044; doi:10.1039/D3RA05388A

data_7247758
_publ_section_title
;
 New polymorphic phase of arachidic acid crystal: structure,
 intermolecular interactions, low-temperature stability and Raman
 spectroscopy combined with DFT calculations
;
_journal_issue                   48
_journal_name_full               'RSC Advances'
_journal_page_first              34032
_journal_page_last               34044
_journal_paper_doi               10.1039/D3RA05388A
_journal_volume                  13
_journal_year                    2023
_chemical_formula_moiety         'C20 H40 O2'
_chemical_formula_sum            'C20 H40 O2'
_chemical_formula_weight         312.52
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2022-06-03
_audit_creation_method
;
Olex2 1.5
(compiled 2022.04.07 svn.rca3783a0 for OlexSys, GUI svn.r6498)
;
_audit_update_record
;
2022-06-05 deposited with the CCDC.	2023-11-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 93.301(9)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   48.478(19)
_cell_length_b                   7.400(3)
_cell_length_c                   5.597(2)
_cell_measurement_reflns_used    2274
_cell_measurement_temperature    298.00
_cell_measurement_theta_max      28.68
_cell_measurement_theta_min      2.94
_cell_volume                     2004.5(13)
_computing_cell_refinement       '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  'XL  (Sheldrick, 2008)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      298.00
_diffrn_detector                 HPAD
_diffrn_detector_area_resol_mean 7.39
_diffrn_detector_type            'Bruker PHOTON II CPAD Area Detector'
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Bruker D8 Venture'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_measurement_specimen_support 'MiTeGen micromount'
_diffrn_radiation_monochromator  'multilayer mirrors'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0581
_diffrn_reflns_av_unetI/netI     0.0776
_diffrn_reflns_Laue_measured_fraction_full 0.988
_diffrn_reflns_Laue_measured_fraction_max 0.965
_diffrn_reflns_limit_h_max       52
_diffrn_reflns_limit_h_min       -64
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            19658
_diffrn_reflns_point_group_measured_fraction_full 0.988
_diffrn_reflns_point_group_measured_fraction_max 0.965
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.282
_diffrn_reflns_theta_min         2.525
_diffrn_source                   'microfocus sealed X-ray tube'
_diffrn_source_current           1.4
_diffrn_source_power             0.07
_diffrn_source_type              'Incoatec I\ms HB'
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.064
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.5687
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1102 before and 0.0527 after correction.
The Ratio of minimum to maximum transmission is 0.7622.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.036
_exptl_crystal_description       plate
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.243
_refine_diff_density_min         -0.301
_refine_diff_density_rms         0.050
_refine_ls_extinction_coef       0.008(3)
_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   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     202
_refine_ls_number_reflns         4807
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.2057
_refine_ls_R_factor_gt           0.0950
_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^)+(0.1424P)^2^+1.1527P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2710
_refine_ls_wR_factor_ref         0.3471
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2015
_reflns_number_total             4807
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d3ra05388a2.cif
_cod_data_source_block           arach_300k
_cod_original_cell_volume        2004.6(13)
_cod_database_code               7247758
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.998
_shelx_estimated_absorpt_t_min   0.994
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All O(H) groups
2.a Secondary CH2 refined with riding coordinates:
 C4(H4A,H4B), C6(H6A,H6B), C7(H7A,H7B), C5(H5A,H5B), C9(H9A,H9B), C8(H8A,H8B),
 C3(H3A,H3B), C11(H11A,H11B), C10(H10A,H10B), C12(H12A,H12B), C13(H13A,H13B),
 C14(H14A,H14B), C2(H2A,H2B), C15(H15A,H15B), C17(H17A,H17B), C16(H16A,H16B),
 C18(H18A,H18B), C19(H19A,H19B)
2.b Idealised Me refined as rotating group:
 C20(H20A,H20B,H20C)
2.c Idealised tetrahedral OH refined as rotating group:
 O1(H1)
;
_shelx_res_checksum              42242
_olex2_diffrn_ambient_temperature_device 'Oxford Cryostream 800'
_olex2_submission_special_instructions 'No special instructions were received'