Syntheses, Structures and Characterizations of Two New Vanadium (V) Complexes: [2‐MePyH] [ V v O 2 (C 14 H 9 N 2 O 3 Br)] and [2‐EtPyH ] [ V v O 2 (C 14 H 9 N 2 O 3 Br) ]

Two new oxovanadium(V) complexes, [2‐MePyH][V v O 2 (L)] (3) and[2‐EtPyH][V v O 2 ,(L)] (4) (salicylaldehyde 5‐bromo salicyloylhydrazone is abbreviated as H 2 L; 2‐MePyH is protonated 2‐Mepyridine; 2‐EtPyH presents protonated 2‐Et‐pyridine) were obtained from a reaction of VOSO 4 and H 2 L in acetonitrile‐methanol with small quantity of 2‐Me‐pyridine or 2‐Et‐pyridine, and characterized by X‐ray diffraction and spectroscopic methods. Crystal data: [2‐MePyH][VO 2 (L)] (3), C 20 H 17 N 3 O 5 BrV, M r = 510.2, monoclinic, P 2 1 /n, a = 0.7363(1) nm, 6 = 0.9514(1) nm, c = 2.8594(2) nm, β = 95.305(2)°, Z = 4 and V=1.9946(3) nm 3 , μ(Mo Kα) = 2.539 mm −1 ; [2‐EtPyH][VO 2 (L)] (4), C 21 H 19 N 3 O 3 BrV, M r = 524.2, triclinic, P 1 , a = 0.8051(1) nm, b = 0.9413(1) nm, c = 1.4648(2) nm, α=99.1900(10)°, α = 99.4530(10)°, γ = 104.6670(10)°, Z = 2 and V= 1.0355(2) nm 3 , μ(Mo Kα) = 2.448 mm −1 , X‐Ray analyses revealed that the crystal structures of 3 and 4 have similar packing modes.