Three α,β-Unsaturated (Carbene)pentacarbonylchromium Complexes
Pohl, E.; Kneisel, B. O.; Herbst-Irmer, R.; de Meijere, A.; Funke, F.; Stein, F.; Acta Crystallographica Section C 51 (1995) 2503–2508; doi:10.1107/S0108270195006160

data_2004262
_publ_section_title
;
 Three \a,\b-Unsaturated (Carbene)pentacarbonylchromium Complexes
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              2503
_journal_page_last               2508
_journal_paper_doi               10.1107/S0108270195006160
_journal_volume                  51
_journal_year                    1995
_chemical_formula_moiety         '[Cr(C20 H21 NO)(CO)5]'
_chemical_formula_sum            'C25 H21 Cr N O6'
_chemical_formula_weight         483.43
_chemical_name_systematic
;
 (2-oxa-cyclo-pentenylidene)pentacarbonylchromium
;
_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'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 94.300(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.9500(10)
_cell_length_b                   18.856(4)
_cell_length_c                   12.522(2)
_cell_measurement_reflns_used    65
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      12.5
_cell_measurement_theta_min      10
_cell_volume                     2342.7(7)
_computing_cell_refinement       DIF4
_computing_data_collection       'DIF4 (Stoe & Cie, 1988a)'
_computing_data_reduction        'REDU4 (Stoe & Cie, 1988b)'
_computing_molecular_graphics    'SHELXTL-Plus (Sheldrick, 1994)'
_computing_publication_material  SHELXL93
_computing_structure_refinement  'SHELXL93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELX90 (Sheldrick, 1990)'
_diffrn_ambient_temperature      153(2)
_diffrn_measurement_device       'Stoe-Huber four-circle diffractometer'
_diffrn_measurement_method       'profile data from 2\q/\w'
_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  0.0382
_diffrn_reflns_av_sigmaI/netI    0.0467
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            6685
_diffrn_reflns_theta_max         22.53
_diffrn_reflns_theta_min         4.11
_diffrn_standards_decay_%        2
_diffrn_standards_interval_time  90
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.528
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.371
_exptl_crystal_description       block
_exptl_crystal_F_000             1000
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.5
_exptl_crystal_size_min          0.4
_refine_diff_density_max         .337
_refine_diff_density_min         -.349
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.074
_refine_ls_goodness_of_fit_obs   1.024
_refine_ls_hydrogen_treatment    'H atoms: see text'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     300
_refine_ls_number_reflns         3020
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.088
_refine_ls_restrained_S_obs      1.024
_refine_ls_R_factor_all          0.0705
_refine_ls_R_factor_obs          0.0428
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+( 0.0323P)^2^+3.9566P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1124
_refine_ls_wR_factor_obs         0.0897
_reflns_number_observed          2252
_reflns_number_total             3021
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            jz1049.cif
_cod_data_source_block           8
_cod_depositor_comments
;
The following automatic conversions were performed:

'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (23
times).

'_geom_bond_publ_flag' value 'N' changed to 'n' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (12
times).

'_geom_angle_publ_flag' value 'Y' changed to 'y' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (39
times).

'_geom_angle_publ_flag' value 'N' changed to 'n' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (16 times).

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc w = 1/[\s^2^(Fo^2^)+(
0.0323P)^2^+3.9566P] 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^)+( 0.0323P)^2^+3.9566P] where
P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2004262