Uniaxial negative thermal expansion facilitated by weak host-guest interactions
Emile R. Engel; Vincent J. Smith; Charl X. Bezuidenhout; Leonard J. Barbour; Chem.Commun. 50 (2014) 4238–; doi:10.1039/C4CC00849A

data_7112241
_publ_section_title
;
 Uniaxial negative thermal expansion facilitated by weak host-guest
 interactions
;
_journal_name_full               Chem.Commun.
_journal_page_first              4238
_journal_paper_doi               10.1039/C4CC00849A
_journal_volume                  50
_journal_year                    2014
_chemical_compound_source        sigma
_chemical_formula_moiety         'C12 H24 O6, 2(C H3 I)'
_chemical_formula_sum            'C14 H30 I2 O6'
_chemical_formula_weight         548.18
_chemical_name_common            273K
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 106.751(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.0683(3)
_cell_length_b                   8.6955(2)
_cell_length_c                   14.2945(5)
_cell_measurement_reflns_used    3014
_cell_measurement_temperature    273(2)
_cell_measurement_theta_max      24.66
_cell_measurement_theta_min      2.39
_cell_volume                     1079.34(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics
'X-Seed (Barbour, 2001; Atwood & Barbour, 2003)'
_computing_publication_material
'X-Seed (Barbour, 2001; Atwood & Barbour, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_pressure         101.3
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'INCOATEC quazar mirrior optics'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0194
_diffrn_reflns_av_sigmaI/netI    0.0197
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            8606
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         2.39
_diffrn_source                   'INCOATEC Mo micro source'
_diffrn_source_type              'Bruker APEX II DUO QUAZAR'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.934
_exptl_absorpt_correction_T_max  0.8672
_exptl_absorpt_correction_T_min  0.6673
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'symmetry-related measurements'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.687
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             536
_exptl_crystal_recrystallization_method iodomethane
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.05
_refine_diff_density_max         1.019
_refine_diff_density_min         -0.804
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     101
_refine_ls_number_reflns         2677
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0512
_refine_ls_R_factor_gt           0.0353
_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^)+(0.0328P)^2^+1.1312P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0797
_refine_ls_wR_factor_ref         0.0878
_reflns_number_gt                1954
_reflns_number_total             2677
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cc00849a2.cif
_cod_data_source_block           C_iodomethane_273K:
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_hydrogen_treatment' value 'Constr' changed to 'constr'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

The following automatic conversions were performed:

data name '_iucr_refine_instruction_details' was replaced with
'_iucr_refine_instructions_details' as specified in the replacement
file 'data/replacement-values/replacement_tags.lst'.

Automatic conversion script
Id: cif_correct_tags 9268 2022-04-12 08:56:07Z antanas 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7112241