N-Methylmelamines: Synthesis, Characterization, and Physical Properties.
List, Manuela; Puchinger, Helmut; Gabriel, Herbert; Monkowius, Uwe; Schwarzinger, Clemens; The Journal of organic chemistry 81 (2016) 4066–4075; doi:10.1021/acs.joc.6b00355

data_4036719
_publ_section_title
;
 N-Methylmelamines: Synthesis, Characterization, and Physical Properties.
;
_journal_issue                   10
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              4066
_journal_page_last               4075
_journal_paper_doi               10.1021/acs.joc.6b00355
_journal_volume                  81
_journal_year                    2016
_chemical_formula_moiety         'C5 H10 N6'
_chemical_formula_sum            'C5 H10 N6'
_chemical_formula_weight         154.19
_space_group_crystal_system      trigonal
_space_group_IT_number           167
_space_group_name_Hall           '-R 3 2"c'
_space_group_name_H-M_alt        'R -3 c :H'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            18
_cell_length_a                   20.343(5)
_cell_length_b                   20.343(5)
_cell_length_c                   9.880(3)
_cell_measurement_temperature    233.(2)
_cell_volume                     3540.9(16)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      233.(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'SMART X2S'
_diffrn_measurement_method       omega-scan
_diffrn_radiation_monochromator  'doubly curved silicon crystal'
_diffrn_radiation_source         'sealed MicroFocus tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1132
_diffrn_reflns_av_sigmaI/netI    0.0347
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            19278
_diffrn_reflns_theta_full        24.91
_diffrn_reflns_theta_max         24.91
_diffrn_reflns_theta_min         3.47
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.97
_exptl_absorpt_correction_T_min  0.95
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.302
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             1476
_exptl_crystal_size_max          0.510
_exptl_crystal_size_mid          0.360
_exptl_crystal_size_min          0.350
_refine_diff_density_max         0.234
_refine_diff_density_min         -0.149
_refine_ls_extinction_coef       0.0020(8)
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     54
_refine_ls_number_reflns         688
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0579
_refine_ls_R_factor_gt           0.0442
_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^)+(0.0771P)^2^+2.1861P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1214
_refine_ls_wR_factor_ref         0.1330
_reflns_number_gt                541
_reflns_number_total             688
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo6b00355_si_004.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'R -3 c'
_cod_database_code               4036719