#------------------------------------------------------------------------------
#$Date: 2025-08-22 10:56:18 +0200 (Fri 22 de Aug de 2025) $
#$Revision: 301860 $
#$URL: svn://www.crystallography.net/cod/cif/7/12/21/7122155.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_7122155
loop_
_publ_author_name
'Negi, Lalita'
'Shrivastava, Ashutosh'
'Das, Dinabandhu'
_publ_section_title
;
 Switching from positive to negative axial thermal expansion in two
 organic crystalline compounds with similar packing.
;
_journal_issue                   76
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              10675
_journal_page_last               10678
_journal_paper_doi               10.1039/c8cc05859h
_journal_volume                  54
_journal_year                    2018
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C18 H16 O2'
_chemical_formula_sum            'C18 H16 O2'
_chemical_formula_weight         264.31
_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'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2018-07-14 deposited with the CCDC.
2018-08-10 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.8987(3)
_cell_length_b                   7.2946(5)
_cell_length_c                   32.966(2)
_cell_measurement_reflns_used    6231
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      28.09
_cell_measurement_theta_min      2.47
_cell_volume                     1418.48(15)
_computing_cell_refinement       'Bruker APEX-III'
_computing_data_collection       'Bruker APEX-III'
_computing_data_reduction        'Bruker SAINT '
_computing_molecular_graphics    'XSEED (Barbour 2017)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'φ and ω scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0300
_diffrn_reflns_av_unetI/netI     0.0500
_diffrn_reflns_Laue_measured_fraction_full 0.983
_diffrn_reflns_Laue_measured_fraction_max 0.982
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       44
_diffrn_reflns_limit_l_min       -43
_diffrn_reflns_number            8484
_diffrn_reflns_point_group_measured_fraction_full 0.974
_diffrn_reflns_point_group_measured_fraction_max 0.968
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         28.321
_diffrn_reflns_theta_min         2.471
_diffrn_source                   microfocus
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6834
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.238
_exptl_crystal_density_meas      ?
_exptl_crystal_description       'HEXAGONAL PLATE'
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.363
_exptl_crystal_size_mid          0.324
_exptl_crystal_size_min          0.085
_refine_diff_density_max         0.204
_refine_diff_density_min         -0.196
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details
;
 Flack x determined using 851 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.2(7)
_refine_ls_extinction_coef       0.017(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     192
_refine_ls_number_reflns         3423
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0720
_refine_ls_R_factor_gt           0.0429
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[σ²(Fo²)+(0.0479P)²+0.2403P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0953
_refine_ls_wR_factor_ref         0.1138
_reflns_Friedel_coverage         0.672
_reflns_Friedel_fraction_full    0.960
_reflns_Friedel_fraction_max     0.948
_reflns_number_gt                2578
_reflns_number_total             3423
_reflns_threshold_expression     'I > 2σ(I)'
_cod_data_source_file            c8cc05859h2.cif
_cod_data_source_block           2_200K
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 7122148--7122167.cif.
;
_cod_original_cell_volume        1418.46(15)
_cod_database_code               7122155
_shelx_shelxl_version_number     2018/3
_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, z+1/2'
'x+1/2, -y+1/2, -z'
'-x, y+1/2, -z+1/2'
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
O1 O 0.3594(3) 0.6328(2) 0.95954(5) 0.0311(4) Uani 1 1 d . .
O2 O 0.9884(3) 0.3794(3) 0.53601(5) 0.0356(5) Uani 1 1 d . .
C1 C 0.1371(5) 0.3705(5) 0.93880(8) 0.0535(9) Uani 1 1 d . .
H1A H 0.070904 0.361881 0.966000 0.080 Uiso 1 1 calc R U
H1B H 0.148348 0.247581 0.926950 0.080 Uiso 1 1 calc R U
H1C H 0.040447 0.447429 0.921631 0.080 Uiso 1 1 calc R U
C2 C 0.3717(4) 0.4548(4) 0.94161(7) 0.0309(6) Uani 1 1 d . .
H2 H 0.468285 0.374918 0.959179 0.037 Uiso 1 1 calc R U
C3 C 0.4768(4) 0.4669(4) 0.90123(7) 0.0303(6) Uani 1 1 d . .
C4 C 0.5581(4) 0.4649(4) 0.86812(7) 0.0290(6) Uani 1 1 d . .
C5 C 0.6600(4) 0.4480(3) 0.82854(6) 0.0255(5) Uani 1 1 d . .
C6 C 0.5466(4) 0.5010(3) 0.79411(6) 0.0243(5) Uani 1 1 d . .
H6 H 0.402637 0.558526 0.796435 0.029 Uiso 1 1 calc R U
C7 C 0.6412(3) 0.4712(3) 0.75519(6) 0.0200(5) Uani 1 1 d . .
C8 C 0.5243(4) 0.5182(3) 0.71907(6) 0.0236(5) Uani 1 1 d . .
H8 H 0.377974 0.572110 0.720690 0.028 Uiso 1 1 calc R U
C9 C 0.6198(4) 0.4868(4) 0.68200(6) 0.0267(5) Uani 1 1 d . .
H9 H 0.539213 0.519455 0.658111 0.032 Uiso 1 1 calc R U
C10 C 0.8371(4) 0.4064(3) 0.67869(6) 0.0245(5) Uani 1 1 d . .
C11 C 0.9512(4) 0.3561(3) 0.71318(6) 0.0223(5) Uani 1 1 d . .
H11 H 1.095447 0.299124 0.710914 0.027 Uiso 1 1 calc R U
C12 C 0.8580(3) 0.3875(3) 0.75202(6) 0.0192(5) Uani 1 1 d . .
C13 C 0.9741(4) 0.3388(3) 0.78803(6) 0.0235(5) Uani 1 1 d . .
H13 H 1.120812 0.285635 0.786321 0.028 Uiso 1 1 calc R U
C14 C 0.8778(4) 0.3672(4) 0.82521(6) 0.0272(5) Uani 1 1 d . .
H14 H 0.957447 0.332402 0.849042 0.033 Uiso 1 1 calc R U
C15 C 0.9415(4) 0.3833(4) 0.63957(7) 0.0287(6) Uani 1 1 d . .
C16 C 1.0342(4) 0.3701(4) 0.60775(6) 0.0301(6) Uani 1 1 d . .
C17 C 1.1498(4) 0.3550(4) 0.56825(6) 0.0300(6) Uani 1 1 d . .
H17 H 1.218674 0.230144 0.565899 0.036 Uiso 1 1 calc R U
C18 C 1.3331(4) 0.4967(4) 0.56317(8) 0.0391(7) Uani 1 1 d . .
H18A H 1.400265 0.485353 0.536098 0.059 Uiso 1 1 calc R U
H18B H 1.450580 0.477649 0.583771 0.059 Uiso 1 1 calc R U
H18C H 1.267866 0.619431 0.566350 0.059 Uiso 1 1 calc R U
H2A H 0.877(6) 0.299(5) 0.5395(9) 0.061(11) Uiso 1 1 d . .
H1 H 0.404(6) 0.623(5) 0.9840(10) 0.062(10) Uiso 1 1 d . .
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'
O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
C2 O1 H1 107(2)
C17 O2 H2A 108(2)
C2 C1 H1A 109.5
C2 C1 H1B 109.5
H1A C1 H1B 109.5
C2 C1 H1C 109.5
H1A C1 H1C 109.5
H1B C1 H1C 109.5
O1 C2 C3 110.0(2)
O1 C2 C1 110.3(2)
C3 C2 C1 110.7(2)
O1 C2 H2 108.6
C3 C2 H2 108.6
C1 C2 H2 108.6
C4 C3 C2 175.7(3)
C3 C4 C5 175.7(3)
C6 C5 C14 119.66(19)
C6 C5 C4 121.4(2)
C14 C5 C4 118.9(2)
C5 C6 C7 120.9(2)
C5 C6 H6 119.6
C7 C6 H6 119.6
C6 C7 C8 122.1(2)
C6 C7 C12 119.18(19)
C8 C7 C12 118.67(19)
C9 C8 C7 120.7(2)
C9 C8 H8 119.6
C7 C8 H8 119.6
C8 C9 C10 120.8(2)
C8 C9 H9 119.6
C10 C9 H9 119.6
C11 C10 C9 119.47(19)
C11 C10 C15 120.1(2)
C9 C10 C15 120.4(2)
C10 C11 C12 121.2(2)
C10 C11 H11 119.4
C12 C11 H11 119.4
C11 C12 C13 122.07(19)
C11 C12 C7 119.13(19)
C13 C12 C7 118.80(18)
C14 C13 C12 120.8(2)
C14 C13 H13 119.6
C12 C13 H13 119.6
C13 C14 C5 120.6(2)
C13 C14 H14 119.7
C5 C14 H14 119.7
C16 C15 C10 177.1(3)
C15 C16 C17 179.7(3)
O2 C17 C16 109.72(19)
O2 C17 C18 108.0(2)
C16 C17 C18 112.2(2)
O2 C17 H17 109.0
C16 C17 H17 109.0
C18 C17 H17 109.0
C17 C18 H18A 109.5
C17 C18 H18B 109.5
H18A C18 H18B 109.5
C17 C18 H18C 109.5
H18A C18 H18C 109.5
H18B C18 H18C 109.5
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
O1 C2 1.429(3)
O1 H1 0.85(3)
O2 C17 1.438(3)
O2 H2A 0.89(4)
C1 C2 1.517(4)
C1 H1A 0.9800
C1 H1B 0.9800
C1 H1C 0.9800
C2 C3 1.471(3)
C2 H2 1.0000
C3 C4 1.192(3)
C4 C5 1.442(3)
C5 C6 1.373(3)
C5 C14 1.418(3)
C6 C7 1.416(3)
C6 H6 0.9500
C7 C8 1.418(3)
C7 C12 1.421(3)
C8 C9 1.365(3)
C8 H8 0.9500
C9 C10 1.414(3)
C9 H9 0.9500
C10 C11 1.371(3)
C10 C15 1.439(3)
C11 C12 1.412(3)
C11 H11 0.9500
C12 C13 1.416(3)
C13 C14 1.367(3)
C13 H13 0.9500
C14 H14 0.9500
C15 C16 1.187(3)
C16 C17 1.474(3)
C17 C18 1.506(4)
C17 H17 1.0000
C18 H18A 0.9800
C18 H18B 0.9800
C18 H18C 0.9800
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 PubChem 139189014
