Nature and strength of C-HO interactions involving formyl hydrogen atoms: computational and experimental studies of small aldehydes.
Thakur, Tejender S.; Kirchner, Michael T.; Bläser, Dieter; Boese, Roland; Desiraju, Gautam R.; Physical chemistry chemical physics : PCCP 13 (2011) 14076–14091; doi:10.1039/c0cp02236e

data_7206162
_publ_section_title
;
 Nature and strength of C-HO interactions involving formyl hydrogen
 atoms: computational and experimental studies of small aldehydes.
;
_journal_issue                   31
_journal_name_full               'Physical chemistry chemical physics : PCCP'
_journal_page_first              14076
_journal_page_last               14091
_journal_paper_doi               10.1039/c0cp02236e
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C2 H5 N O'
_chemical_formula_weight         59.07
_chemical_name_common            N-methylformamide
_chemical_name_systematic
;
N-methylformamide
;
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.207(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   8.7855(6)
_cell_length_b                   8.5307(6)
_cell_length_c                   8.6148(7)
_cell_measurement_reflns_used    6044
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      25.33
_cell_measurement_theta_min      2.32
_cell_volume                     645.64(8)
_computing_cell_refinement       'BRUKER AXS SMART APEX 2 Vers. 3.0-2009'
_computing_data_collection       'BRUKER AXS SMART APEX 2 Vers. 3.0-2009'
_computing_data_reduction        'BRUKER AXS SMART APEX 2 Vers. 3.0-2009'
_computing_molecular_graphics    'BRUKER AXS SHELXTL (c) 2008 / Vers. 2008/4'
_computing_publication_material  'BRUKER AXS SHELXTL (c) 2008 / Vers. 2008/4'
_computing_structure_refinement  'BRUKER AXS SHELXTL (c) 2008 / Vers. 2008/4'
_computing_structure_solution    'BRUKER AXS SMART APEX 2 Vers. 3.0-2009'
_diffrn_ambient_temperature      203(2)
_diffrn_detector_area_resol_mean 512
_diffrn_measured_fraction_theta_full 0.864
_diffrn_measured_fraction_theta_max 0.864
_diffrn_measurement_device_type
;
Siemens SMART three axis goniometer with APEX II area detector system
;
_diffrn_measurement_method
;
Data collection strategy APEX 2 / COSMO
with chi = 0
;
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0493
_diffrn_reflns_av_sigmaI/netI    0.0251
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            9778
_diffrn_reflns_theta_full        25.46
_diffrn_reflns_theta_max         25.46
_diffrn_reflns_theta_min         2.32
_exptl_absorpt_coefficient_mu    0.097
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.215
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cylindric
_exptl_crystal_F_000             256
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.190
_refine_diff_density_min         -0.155
_refine_diff_density_rms         0.032
_refine_ls_extinction_coef       0.067(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     90
_refine_ls_number_reflns         1035
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0357
_refine_ls_R_factor_gt           0.0335
_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^)+(0.0425P)^2^+0.2134P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0921
_refine_ls_wR_factor_ref         0.0938
_reflns_number_gt                940
_reflns_number_total             1035
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0cp02236e.txt
_cod_data_source_block           me_formamid
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7206162