The flexibility of long chain substituents influences spin-crossover in isomorphous lipid bilayer crystals.
Galadzhun, Iurii; Kulmaczewski, Rafal; Shahid, Namrah; Cespedes, Oscar; Howard, Mark J.; Halcrow, Malcolm A.; Chemical communications (Cambridge, England) 57 (2021) 4039–4042; doi:10.1039/d1cc01073e

data_7128045
_publ_section_title
;
 The flexibility of long chain substituents influences spin-crossover in
 isomorphous lipid bilayer crystals.
;
_journal_issue                   33
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              4039
_journal_page_last               4042
_journal_paper_doi               10.1039/d1cc01073e
_journal_volume                  57
_journal_year                    2021
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C23 H29 N5'
_chemical_formula_sum            'C23 H29 N5'
_chemical_formula_weight         375.51
_chemical_name_systematic
;
2-(4-{Dodec-1-yn-1-yl}pyrazol-1-yl)-6-(pyrazol-1-yl)pyridine
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2019-07-18
_audit_creation_method
;
  Olex2 1.2
  (compiled Apr 23 2013 17:54:37, GUI svn.r4466)
;
_audit_update_record
;
2021-02-20 deposited with the CCDC.	2021-03-22 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.977(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   5.3937(2)
_cell_length_b                   5.4359(2)
_cell_length_c                   35.4175(15)
_cell_measurement_reflns_used    4981
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      34.13
_cell_measurement_theta_min      0.58
_cell_volume                     1038.28(7)
_computing_cell_refinement       'XIA2 0.4.0.438-g4431aaa (Winter, 2010)'
_computing_data_reduction        'XIA2 0.4.0.438-g4431aaa (Winter, 2010)'
_computing_molecular_graphics    'XSEED (Barbour, 2001)'
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Fluid Film Devices'
_diffrn_measurement_method       'shutterless scans'
_diffrn_radiation_monochromator  'silicon 111'
_diffrn_radiation_source         'Diamond Light Source station I19'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.68890
_diffrn_reflns_av_R_equivalents  0.0940
_diffrn_reflns_av_unetI/netI     0.1017
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       43
_diffrn_reflns_limit_l_min       -43
_diffrn_reflns_number            10313
_diffrn_reflns_theta_full        24.62
_diffrn_reflns_theta_max         25.24
_diffrn_reflns_theta_min         0.56
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.069
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.995
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS (Sheldrick, 2002).  University of Gottingen, Germany.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.201
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       fragment
_exptl_crystal_F_000             404
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: acetonitrile'
_exptl_crystal_size_max          0.06
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.411
_refine_diff_density_min         -0.287
_refine_diff_density_rms         0.076
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   2(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.128
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     254
_refine_ls_number_reflns         2284
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.128
_refine_ls_R_factor_all          0.1019
_refine_ls_R_factor_gt           0.0896
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1406P)^2^+0.1546P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2298
_refine_ls_wR_factor_ref         0.2395
_reflns_number_gt                1835
_reflns_number_total             2284
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d1cc01073e2.cif
_cod_data_source_block           ig13c12m
_cod_depositor_comments
'Adding full bibliography for 7128045--7128048.cif.'
_cod_database_code               7128045
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C19(H19A,H19B), C20(H20A,H20B), C21(H21A,H21B), C22(H22A,H22B), C23(H23A,
 H23B), C24(H24A,H24B), C25(H25A,H25B), C26(H26A,H26B), C27(H27A,H27B)
2.b Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C5(H5), C9(H9), C10(H10), C11(H11), C14(H14), C16(H16)
2.c Idealised Me refined as rotating group:
 C28(H28A,H28B,H28C)
;