On the crystal structures and melting point alternation of the n-alkyl carboxylic acids
Bond, Andrew D.; New Journal of Chemistry 28 (2004) 104–114; doi:10.1039/b307208h

data_7050146
_publ_section_title
;
 On the crystal structures and melting point alternation of the n-alkyl
 carboxylic acids
;
_journal_coden_ASTM              NJCHE5
_journal_issue                   1
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              104
_journal_page_last               114
_journal_paper_doi               10.1039/b307208h
_journal_volume                  28
_journal_year                    2004
_chemical_formula_moiety         'C6 H12 O2'
_chemical_formula_sum            'C6 H12 O2'
_chemical_formula_weight         116.16
_chemical_melting_point          271
_chemical_name_common            'hexanoic acid'
_chemical_name_systematic        'hexanoic acid'
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 106.549(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.0180(15)
_cell_length_b                   5.0236(5)
_cell_length_c                   9.9426(6)
_cell_measurement_reflns_used    4861
_cell_measurement_temperature    240(2)
_cell_measurement_theta_max      25.03
_cell_measurement_theta_min      1.02
_cell_volume                     719.04(11)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius, 1998)'
_computing_data_reduction
;
HKL Denzo and Scalepack (Otwinowski & Minor, 1997)
;
_computing_publication_material  'SHELXTL v6.12 (Bruker AXS, 2001)'
_computing_structure_refinement  'SHELXTL v6.12 (Bruker AXS, 2001)'
_computing_structure_solution    'SIR-92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      240(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       'Thin slice \w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.0469
_diffrn_reflns_av_sigmaI/netI    0.0397
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            4974
_diffrn_reflns_theta_full        24.95
_diffrn_reflns_theta_max         24.95
_diffrn_reflns_theta_min         4.10
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.981
_exptl_absorpt_correction_T_min  0.776
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sortav Blessing (1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.073
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cylinder
_exptl_crystal_F_000             256
_exptl_crystal_size_length       0.35
_exptl_crystal_size_rad          0.15
_refine_diff_density_max         0.129
_refine_diff_density_min         -0.106
_refine_diff_density_rms         0.027
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     77
_refine_ls_number_reflns         1233
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0732
_refine_ls_R_factor_gt           0.0504
_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^)+(0.0639P)^2^+0.1124P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1253
_refine_ls_wR_factor_ref         0.1393
_reflns_number_gt                886
_reflns_number_total             1233
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b307208h.txt
_cod_data_source_block           C6
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7050146