A thermal expansion investigation of the melting point anomaly in trihalomesitylenes
Viswanadha G. Saraswatula; Binoy K. Saha; Chem.Commun. 51 (2015) 9829–; doi:10.1039/C5cc03033A

data_7117257
_publ_section_title
;
 A thermal expansion investigation of the melting point anomaly in
 trihalomesitylenes
;
_journal_name_full               Chem.Commun.
_journal_page_first              9829
_journal_paper_doi               10.1039/C5cc03033A
_journal_volume                  51
_journal_year                    2015
_chemical_formula_moiety         'C12 H18'
_chemical_formula_sum            'C12 H18'
_chemical_formula_weight         162.26
_chemical_name_systematic
;
Hexamethylbenzene  
;
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2013-09-28
_audit_creation_method
;
  Olex2 1.2
  (compiled Dec  5 2012 16:17:34, GUI svn.r4385)
;
_audit_update_record
;
2015-04-06 deposited with the CCDC.
2015-05-07 downloaded from the CCDC.
;
_cell_angle_alpha                103.949(16)
_cell_angle_beta                 98.651(13)
_cell_angle_gamma                99.531(17)
_cell_formula_units_Z            1
_cell_length_a                   5.2748(9)
_cell_length_b                   6.2602(15)
_cell_length_c                   8.0316(12)
_cell_measurement_reflns_used    868
_cell_measurement_temperature    226(2)
_cell_measurement_theta_max      28.7458
_cell_measurement_theta_min      5.2206
_cell_volume                     248.77(9)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
;
_computing_molecular_graphics
;
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_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, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_computing_structure_solution
;
SHELXS, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_diffrn_ambient_temperature      226(2)
_diffrn_detector_area_resol_mean 15.9821
_diffrn_measured_fraction_theta_full 0.9901
_diffrn_measured_fraction_theta_max 0.9208
_diffrn_measurement_details
;
  1 omega  -47.00  -17.00   1.0000    5.0000
omega____ theta____ kappa____ phi______ frames
    -      -17.4960  109.0000   32.0000 30

  2 omega  -23.00   21.00   1.0000    5.0000
omega____ theta____ kappa____ phi______ frames
    -      -17.4960  -99.0000 -150.0000 44

  3 omega  -85.00  -41.00   1.0000    5.0000
omega____ theta____ kappa____ phi______ frames
    -      -17.4960  178.0000   60.0000 44

  4 omega   25.00   61.00   1.0000    5.0000
omega____ theta____ kappa____ phi______ frames
    -       19.2928  -99.0000    0.0000 36

  5 omega  -46.00   36.00   1.0000    5.0000
omega____ theta____ kappa____ phi______ frames
    -       19.2928  -37.0000  -60.0000 82

  6 omega  -24.00   90.00   1.0000    5.0000
omega____ theta____ kappa____ phi______ frames
    -       19.2928    0.0000  -30.0000 114

  7 omega  -93.00  -43.00   1.0000    5.0000
omega____ theta____ kappa____ phi______ frames
    -      -17.4960 -178.0000  120.0000 50

  8 omega  -86.00    4.00   1.0000    5.0000
omega____ theta____ kappa____ phi______ frames
    -      -17.4960  -57.0000    0.0000 90
;
_diffrn_measurement_device_type  'Xcalibur, Eos'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_UB_11      -0.0691614000
_diffrn_orient_matrix_UB_12      -0.0493185000
_diffrn_orient_matrix_UB_13      -0.0874844000
_diffrn_orient_matrix_UB_21      0.0556714000
_diffrn_orient_matrix_UB_22      0.0968245000
_diffrn_orient_matrix_UB_23      -0.0236574000
_diffrn_orient_matrix_UB_31      0.1071209000
_diffrn_orient_matrix_UB_32      -0.0495332000
_diffrn_orient_matrix_UB_33      -0.0202057000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.0195
_diffrn_reflns_av_unetI/netI     0.0218
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            2321
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.81
_diffrn_reflns_theta_min         5.23
_diffrn_source                   'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.060
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.64740
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.083
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             90
_exptl_crystal_size_max          0.8
_exptl_crystal_size_mid          0.5
_exptl_crystal_size_min          0.4
_refine_diff_density_max         0.562
_refine_diff_density_min         -0.245
_refine_diff_density_rms         0.077
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.138
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     58
_refine_ls_number_reflns         1135
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.138
_refine_ls_R_factor_all          0.0941
_refine_ls_R_factor_gt           0.0835
_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^)+(0.1670P)^2^+0.0597P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2517
_refine_ls_wR_factor_ref         0.2724
_reflns_number_gt                920
_reflns_number_total             1135
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5cc03033a2.cif
_cod_data_source_block           hmb-226K
_cod_original_cell_volume        248.77(8)
_cod_database_code               7117257