Is bond stretch isomerism in mononuclear transition metal complexes a real issue? The misleading case of the MoCl5/tetrahydropyran reaction system.
Di Nicola, Francesco Paolo; Lanzi, Massimiliano; Marchetti, Fabio; Pampaloni, Guido; Zacchini, Stefano; Dalton transactions (Cambridge, England : 2003) 44 (2015) 12653–12659; doi:10.1039/c5dt01378j

data_7035431
_publ_section_title
;
 Is bond stretch isomerism in mononuclear transition metal complexes a
 real issue? The misleading case of the MoCl5/tetrahydropyran reaction
 system.
;
_journal_issue                   28
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              12653
_journal_page_last               12659
_journal_paper_doi               10.1039/c5dt01378j
_journal_volume                  44
_journal_year                    2015
_chemical_formula_sum            'C10 H20 Cl3.08 Mo O2.92'
_chemical_formula_weight         392.01
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           43
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'F 2 -2d'
_symmetry_space_group_name_H-M   'F d d 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2015-01-12 deposited with the CCDC.
2015-06-02 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   34.424(5)
_cell_length_b                   7.3591(10)
_cell_length_c                   12.1582(16)
_cell_measurement_reflns_used    5316
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.570
_cell_measurement_theta_min      2.3665
_cell_volume                     3080.0(7)
_computing_cell_refinement       'APEX2 (Bruker AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker AXS, 2006)'
_computing_data_reduction        'SAINT (Bruker AXS, 2004)'
_computing_molecular_graphics    'ORTEPII (Johnson, 1996)'
_computing_publication_material  'XCIF (Bruker AXS, 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  "'phi and omega 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  0.0229
_diffrn_reflns_av_unetI/netI     0.0187
_diffrn_reflns_limit_h_max       43
_diffrn_reflns_limit_h_min       -43
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            8150
_diffrn_reflns_theta_full        26.97
_diffrn_reflns_theta_max         26.97
_diffrn_reflns_theta_min         2.37
_exptl_absorpt_coefficient_mu    1.379
_exptl_absorpt_correction_T_max  0.8745
_exptl_absorpt_correction_T_min  0.7895
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
; 
 Data were corrected for Lorentz polarization and absorption
 effects (empirical absorption correction SADABS).
 R(int) =  0.0939 (selected reflections only, before parameter refinement)
 R(int) =  0.0404 (selected reflections only, after parameter refinement)
;
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.691
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1581
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.267
_refine_diff_density_min         -0.409
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.98(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.080
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     89
_refine_ls_number_reflns         1679
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.079
_refine_ls_R_factor_all          0.0168
_refine_ls_R_factor_gt           0.0159
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0097P)^2^+4.9752P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0345
_refine_ls_wR_factor_ref         0.0348
_reflns_number_gt                1633
_reflns_number_total             1679
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5dt01378j1.cif
_cod_data_source_block           2d
_cod_depositor_comments
'Adding full bibliography for 7035429--7035437.cif.'
_cod_original_cell_volume        3080.1(7)
_cod_original_sg_symbol_H-M      Fdd2
_cod_database_code               7035431