Studies on Peroxomolybdates. VII. The Crystal Structure of (Tri)ammonium Fluoride Oxoperoxotetrafluoromolybdate(VI), (NH4)3F[MoO(O2)F4].

Molybdenum(VI) Peroxo α-Amino Acid Complexes: Synthesis, Spectra, and Properties of MoO(O2)2(α-aa)(H2O) for α-aa = Glycine, Alanine, Proline, Valine, Leucine, Serine, Asparagine, Glutamine, and Glutamic Acid. X-ray Crystal Structures of the Glycine, Alanine, and Proline Compounds

“…They fall in the expected range for all of the oxodiperoxo Mo(VI) complexes: monomeric, ,− bridged dimers 21,26,27,32 or trimers, and even the diperoxohep- tamolybdates . In the oxomonoperoxo Mo(VI) complexes, with or without a heteroligand, the O−O bond is shorter. ,, The Mo−O(O 2 2- ) bond lengths also fall into the expected range: between 1.908(2) and 1.974(2) Å. The two Mo−O(O 2 2- ) bonds in a coordinated peroxo group are not equal.…”

“…The three structures MoO(O 2 ) 2 (α-aa)(H 2 O), α-aa = gly ( 1 ), ala ( 2 ), and pro ( 3 ), represent the classical stereochemistry of Mo(VI) peroxo complexes: a distorted pentagonal bipyramid. ,,− ,,− Relevant bond lengths (listed in Table ) demonstrate characteristic structural features for selected oxodiperoxo Mo(VI) structures (with reasonable estimated standard deviations). In addition to the structures 1 − 3 , the following diperoxo complexes, reported previously, are listed for comparison: K 2 MoO(O 2 ) 2 C 2 O 4 , MoO(O 2 ) 2 (HMPT)(H 2 O), MoO(O 2 ) 2 [O(P)N], H[MoO(O 2 ) 2 (C 5 H 4 NCO 2 )]·2C 5 H 4 NCO 2 H•H 2 O, and (C 3 H 5 N 2 ) 2 [O{MoO(O 2 ) 2 H 2 O} 2 ] …”

“…12 In the oxomonoperoxo Mo(VI) complexes, with or without a heteroligand, the O-O bond is shorter. 8,30,31 The Mo-O(O 2 2-) bond lengths also fall into the expected range: between 1.908(2) and 1.974(2) Å. The two Mo-O(O 2 2-) bonds in a coordinated peroxo group are not equal.…”

“…The pentagonal units are linked togetherby intermolecular hydrogen bonding to form an infinite polymer network. These structures represent the typical stereochemistry of Mo(VI) peroxo complexes. ,,− ,,−

1 Structure and labeling scheme for MoO(O 2 ) 2 (Alanine)(H 2 O) ( 2 ).

2 Structure and labeling scheme for MoO(O 2 ) 2 (proline)(H 2 O) ( 3 ).

…”

“…35,36 The three structures MoO(O 2 ) 2 (R-aa)(H 2 O), R-aa ) gly (1), ala (2), and pro (3), represent the classical stereochemistry of Mo(VI) peroxo complexes: a distorted pentagonal bipyramid. 2,3,[6][7][8][9]12,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] Relevant bond lengths (listed in Table 10) demonstrate characteristic structural features for selected oxodiperoxo Mo(VI) structures (with reasonable estimated standard deviations). In addition to the structures 1-3, the following diperoxo complexes, reported previously, are listed for comparison: K 2 MoO (O 2 calculated.…”