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_4036717
_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         'C4 H8 N6'
_chemical_formula_sum            'C4 H8 N6'
_chemical_formula_weight         140.16
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'APEX2 v2010.1-2'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.2421(16)
_cell_length_b                   7.2490(16)
_cell_length_c                   12.642(3)
_cell_measurement_reflns_used    2689
_cell_measurement_temperature    300.(2)
_cell_measurement_theta_max      23.3659
_cell_measurement_theta_min      3.2227
_cell_volume                     663.7(3)
_computing_cell_refinement       'SAINT V7.66A (Bruker AXS, 2009)'
_computing_data_reduction        'SAINT V7.66A (Bruker AXS, 2009)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      300.(2)
_diffrn_detector_area_resol_mean 8.3330
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0652
_diffrn_reflns_av_sigmaI/netI    0.0378
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            5031
_diffrn_reflns_theta_full        23.59
_diffrn_reflns_theta_max         23.59
_diffrn_reflns_theta_min         1.61
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_T_max  0.97
_exptl_absorpt_correction_T_min  0.72
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2008/1 (Bruker AXS)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.403
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             296
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.35
_refine_diff_density_max         0.159
_refine_diff_density_min         -0.163
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   10.(8)
_refine_ls_extinction_coef       0.025(11)
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.103
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     94
_refine_ls_number_reflns         612
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.103
_refine_ls_R_factor_all          0.0381
_refine_ls_R_factor_gt           0.0369
_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^)+(0.0689P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0953
_refine_ls_wR_factor_ref         0.0960
_reflns_number_gt                595
_reflns_number_total             612
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo6b00355_si_002.cif
_cod_data_source_block           I
_cod_original_cell_volume        663.7(2)
_cod_database_code               4036717