Pyrido[1,2-c][1,2,4]triazol-3-ylidene: reactivity and its application in organocatalysis and organometallic catalysis
Wei, Siping; Liu, Bo; Zhao, Dongbing; Wang, Zhen; Wu, Jie; Lan, Jingbo; You, Jingsong; Organic & Biomolecular Chemistry 7 (2009) 4241–4247; doi:10.1039/b910073c

data_7150734
_publ_section_title
;
 Pyrido[1,2-c][1,2,4]triazol-3-ylidene: reactivity and its application
 in organocatalysis and organometallic catalysis
;
_journal_issue                   20
_journal_name_full               'Organic &amp; Biomolecular Chemistry'
_journal_page_first              4241
_journal_page_last               4247
_journal_paper_doi               10.1039/b910073c
_journal_volume                  7
_journal_year                    2009
_chemical_formula_sum            'C7 H9 N3'
_chemical_formula_weight         135.17
_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                 93.53(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.329(3)
_cell_length_b                   9.235(2)
_cell_length_c                   14.718(4)
_cell_measurement_reflns_used    14
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      9.29
_cell_measurement_theta_min      4.60
_cell_volume                     722.9(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  CAD4
_diffrn_measurement_method       Omega/2-Theta
_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  0.0048
_diffrn_reflns_av_sigmaI/netI    0.0812
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            1408
_diffrn_reflns_theta_full        25.25
_diffrn_reflns_theta_max         25.25
_diffrn_reflns_theta_min         2.61
_diffrn_standards_decay_%        4.234
_diffrn_standards_interval_count 120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.242
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             288
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.208
_refine_diff_density_min         -0.222
_refine_diff_density_rms         0.057
_refine_ls_extinction_coef       0.023(7)
_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   1.024
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     95
_refine_ls_number_reflns         1288
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.2079
_refine_ls_R_factor_gt           0.0612
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0671P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1346
_refine_ls_wR_factor_ref         0.1692
_reflns_number_gt                471
_reflns_number_total             1288
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b910073c.txt
_cod_data_source_block           CCDC_725113
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0671P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0671P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        723.0(5)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7150734