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_7050147
_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         'C7 H14 O2'
_chemical_formula_sum            'C7 H14 O2'
_chemical_formula_weight         130.18
_chemical_melting_point          262
_chemical_name_common            'heptanoic acid'
_chemical_name_systematic        'heptanoic 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                 92.864(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.0089(15)
_cell_length_b                   5.0764(4)
_cell_length_c                   10.1589(7)
_cell_measurement_reflns_used    4280
_cell_measurement_temperature    230(2)
_cell_measurement_theta_max      25.03
_cell_measurement_theta_min      1.00
_cell_volume                     824.56(12)
_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      230(2)
_diffrn_measured_fraction_theta_full 0.880
_diffrn_measured_fraction_theta_max 0.880
_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  0.0369
_diffrn_reflns_av_sigmaI/netI    0.0421
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            2970
_diffrn_reflns_theta_full        25.42
_diffrn_reflns_theta_max         25.42
_diffrn_reflns_theta_min         4.02
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.981
_exptl_absorpt_correction_T_min  0.899
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sortav Blessing (1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.049
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cylinder
_exptl_crystal_F_000             288
_exptl_crystal_size_length       0.35
_exptl_crystal_size_rad          0.15
_refine_diff_density_max         0.130
_refine_diff_density_min         -0.098
_refine_diff_density_rms         0.026
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     86
_refine_ls_number_reflns         1340
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.1010
_refine_ls_R_factor_gt           0.0624
_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^)+(0.0747P)^2^+0.2284P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1569
_refine_ls_wR_factor_ref         0.1855
_reflns_number_gt                845
_reflns_number_total             1340
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b307208h.txt
_cod_data_source_block           C7
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7050147