Synthesis and reactivity of molybdenum and tungsten bis(dinitrogen) complexes supported by diphosphine chelates containing pendant amines.
Weiss, Charles J.; Groves, Amy N.; Mock, Michael T.; Dougherty, William G.; Kassel, W. Scott; Helm, Monte L.; Dubois, Daniel L.; Bullock, R. Morris; Dalton transactions (Cambridge, England : 2003) 41 (2012) 4517–4529; doi:10.1039/c2dt12224c

data_7018624
_publ_section_title
;
 Synthesis and reactivity of molybdenum and tungsten bis(dinitrogen)
 complexes supported by diphosphine chelates containing pendant amines.
;
_journal_issue                   15
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              4517
_journal_page_last               4529
_journal_paper_doi               10.1039/c2dt12224c
_journal_volume                  41
_journal_year                    2012
_chemical_formula_sum            'C58 H64 N4 O1.5 P4 W'
_chemical_formula_weight         1148.86
_chemical_name_systematic
;
?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                77.0490(10)
_cell_angle_beta                 72.3200(10)
_cell_angle_gamma                83.3430(10)
_cell_formula_units_Z            2
_cell_length_a                   11.5609(4)
_cell_length_b                   14.1387(5)
_cell_length_c                   17.2056(6)
_cell_measurement_reflns_used    9781
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      33.22
_cell_measurement_theta_min      2.43
_cell_volume                     2607.89(16)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0208
_diffrn_reflns_av_sigmaI/netI    0.0315
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            56743
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         33.38
_diffrn_reflns_theta_min         1.48
_exptl_absorpt_coefficient_mu    2.383
_exptl_absorpt_correction_T_max  0.7017
_exptl_absorpt_correction_T_min  0.6222
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.463
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1172
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_platon_squeeze_details
;
SQUEEZE results are consistent with 1.5 molecules of THF per asymmetric unit.
These molecules were located from the difference map but one was disordered
over the special position and would not stabilize during refinement.

PLATON Reference : Spek, A.L. (2003). J. Appl. Cryst. 36, 7-13.
Spek, A.L. (2009). Acta Cryst. D65, 148-155.
;
_refine_diff_density_max         0.996
_refine_diff_density_min         -1.075
_refine_diff_density_rms         0.089
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     554
_refine_ls_number_reflns         19916
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0258
_refine_ls_R_factor_gt           0.0218
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0245P)^2^+0.6341P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0507
_refine_ls_wR_factor_ref         0.0522
_reflns_number_gt                18079
_reflns_number_total             19916
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2dt12224c.txt
_cod_data_source_block           trans-W(N2)2(PMePh2)4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P-1
_cod_original_formula_sum        'C58 H64 N4 O1.50 P4 W'
_cod_database_code               7018624