Indexed by:
Abstract:
iron complexes with N-acetylpicoloylhydrazide (Haphz) and N-phenylpicoloylhydrazide (Hphphz), [Fe-2(aphz)(2)(mu-CH3OH)(2)Cl-2] . CH3OHO (C19H26Cl2Fe2N6O7, M-r = 633.06) and Fe(phphz) Cl-2(2, C13H10Cl2FeN3O2, M-r=366-99), were synthesized. Complex 1 belongs to a triclinic system, space group P (1) over bar, with cell parameters a=0.833 59(6) nm, b=1.099 90(9) nm, c=0.750 54(7) nm, alpha= 91-412(3)degrees, beta=96.683(3)degrees, gamma =107.997(6)degrees, V=0.648 69(9) nm(3), Z=1, D-c=1.621 Mg/m(3), F(000) = 324, mu(Mo Kalpha) = 1.374 mm(-1), R=0.0318 and wR=0.0864 for 2547 [I>2sigma(I)] observed reflections, GOF=1.112. Complex 2 belongs to triclinic system, space group P (1) over bar, a=0. 690 38(6) nm, b=0.946070) nm, c=1.185 82(7) nm, alpha=89. 383(5)degrees, beta=81.515(2)degrees, gamma=69.214(2)degrees, V = 0.715 5(1) nm(3), Z=2, D-c =1.704 Mg/m(3), F(000) =370, mu(Mo Kalpha) =1.433 mm(-1), R=0.068 land wR=0.135 2 for 1 720[I>2sigma(I)] observed reflections, GOF=1.056. The binuclear complex 1 has a crystallographic center. The two methanol oxygen atoms in complex 1 bridges two iron atoms, forming a Fe-2 (mu-O)(2) core with crystallographic centrosymmetry and (FeFe)-Fe-... distance is 0.316 09 nm. The iron atom is octahedrally coordinated by two nitrogen atoms and one oxygen of the N-acetylpicoloylhydrazide ligand, two methanol oxygen atoms and one chloride ion. The neighboring molecules in complex 1 are connected by hydrogen bonding, forming an infinite chain structure. The iron( E) ion in complex 2 has a strongly distorted square pyramidal geometry with three donors of the N-phenylpicoloylhydrazide ligand and two chloride ions. The two centrosymmetry-related molecules of complex 2 are connected as a pair by two N-(HO)-O-... hydrogen bonds. In the two title complexes, v(Cdouble bondO) and v(C-N) are shifted to lower frequencies in IR spectra; pi-pi* charge transitions and d-pi* charge-transitions are observed in their electronic spectra. The emission lines (lambda(ex) = 310 nm) are shifted to higher frequencies in fluorescence spectra.
Keyword:
Reprint 's Address:
Email:
Source :
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN: 0251-0790
CN: 22-1131/O6
Year: 2003
Issue: 12
Volume: 24
Page: 2137-2142
0 . 7 9 6
JCR@2003
0 . 7 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
JCR Journal Grade:2
Cited Count:
WoS CC Cited Count: 7
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
Affiliated Colleges: