154
J Chem Crystallogr (2012) 42:150–154
3. Suez IHA, Pehkonen SO, Hoffmann MR (1994) Sci Technol
28:2080
4. Terra LH, Areias AMC, Gaubeur I, Suez-Iha MEV (1999)
Spectrosc Lett 32:257
5. Patai S (1970) The chemistry of carbon–nitrogen double bond.
Interscience, New York
6. Iskander MF, Zayan SE, Khalifa MA, Elsayed L (1974) J Inorg
Nucl Chem 36:556
7. Marchent JR, Clothia DS (1970) J Med Chem 13:335
8. Sridhar S, Saravanan M, Ramesh A (2001) Eur J Med Chem
36:615
9. Bottari B, Maccari R, Monforte F, Ottana R, Rotondo E, Vigorita
M (2000) Bioorg Med Chem Lett 10:657
10. Kaymakciogul B, Rollas S (2002) Farmaco 57:595
11. Ainscough E, Brodie A, Ranford J, Waters M (1995) Inorg Chim
Acta 236:83
reductive response at 0.4 V. On scanning to negative
direction up to -2.0 V we observe one quasireversible
reduction at -0.68 V (peak-to-peak separation, DEp,
190 mV) and a second irreversible reduction at -1.3 V.
The oxidation may refer to electron extraction from metal
ion and is assigned to Mn(III)/Mn(II) redox response. The
free ligand is p-acidic keto or enol tautomer type system
while in the complex it is enolato function and may have
several reductive forms. So the reduction at -0.68 V may
be assigned to imine reduction (–C=N–)/(–C=N–)-. The
reduction at more negative potential (-1.3 V) may be
raised from the repulsion of second electron addition to
already reduced motif.
12. Ainscough E, Brodie A, Ranford J, Waters M (1998) Inorg Chim
Acta 267:27
13. Easmon J, Puerstinger G, Roth T, Feibig H, Jenny M, Jaeger W,
Heinish G, Hofmann J (2001) Int J Cancer 94:89
14. Ku¨cu¨kgu¨zel S, Rollas S, Ku¨cu¨kgu¨zel I, Kiraz M (1999) Eur J
Med Chem 34:1093
15. Seth S, Chakraborty S (1984) Acta Crystallogr C 40:1530
16. de Sousa GF, Filgueiras CAL, Abras A, Al-Juaid SS, Hitchcock
PB, Nixon JF (1994) Inorg Chim Acta 218:139
Conclusion
In this paper, we have reported one new octahedral Mn(II)
complex with a hydrazone ligand (Hacpbh) having NNO
donor sets. The complex has been characterized by ana-
lytical, spectral and magnetic methods. Redox activity of
the complex shows Mn(III)/Mn(II) response along with
imine reductions. Structural characterizations by single-
crystal X-ray diffraction analysis has also been discussed
and the central Mn(II) ion possesses a distorted octahedral
geometry. Our next attempt will be to focus on the
synthesis of different hydrazone ligands incorporating
substituents on the phenyl ring and investigating the
coordination modes of other transition metal complexes.
´
´
´
17. Andjelkovic K, Ivanovic I, Niketic SR, Prelesnik B, Leovac VM
(1997) Polyhedron 16:4221
ˇ
´
´
´
ˇ ´
´
18. And-jelkovic K, Jakovljevic G, Zlatovic M, Tesic Z, Sladic D,
Howing J, Tellgren R (2004) J Serb Chem Soc 69:651
19. Bonardi A, Merlo C, Pelizzi C, Pelizzi G, Tarasconi P, Vitali F,
Cavatorta F (1991) J Chem Soc Dalton Trans 1063
20. Palenik GJ, Wester DW (1978) Inorg Chem 17:864
21. Sangeetha NR, Pal S, Pal S (2000) Polyhedron 19:2713
22. Plass W, Pohlmann A, Yozgatli HP (2000) J Inorg Biochem
80:181
23. Dinda R, Sengupta P, Ghosh S, Mak TCW (2002) Inorg Chem
41:1684
24. Raveendran R, Pal S (2005) Polyhedron 24:57
25. Naskar S, Biswas S, Mishra D, Adhikary B, Falvello LR, Soler T,
Schwalbe CH, Chattopadhyay SK (2004) Inorg Chim Acta
357:4257
Supplementary Material
26. Sen S, Mitra S, Hughes DL, Rosair G, Desplanches C (2007)
Polyhedron 26:1740
27. Sen S, Talukder P, Rosair G, Mitra S (2005) Struct Chem 16:605
28. Sen S, Mitra S, Hughes DL, Rosair G, Desplanches C (2007)
Inorg Chim Acta 360:4085
29. Khalil TE, Labib L, Iskander MF (1994) Polyhedron 13:2569
30. Sheldrick GM (1990) SHELXL-PLUS. Siemens X-ray Analytical
Instruments Inc., Madison
Crystallographic data has been deposited at the Cambridge
Crystallographic Data Center with deposition number
725518. Copies of the information may be obtained free of
charge from The Director, CCDC, 12 Union Road, Cam-
bridge, CB2 1EZ, UK (Fax: ?44-1233-336033; E-mail:
31. Sheldrick GM (1993) SHELXL 93: program for crystal structure
¨
refinement. University of Gottingen, Germany
32. Addison AW, Rao TN, Reedijk J, van Rijn J, Verschoor GC
(1984) J Chem Soc Dalton Trans 1349
Acknowledgments KD and CS would like to thank to DST
(Department of Science and Technology, New Delhi, India) for the
grant (SR/S1/IC-31/2008) to carry out the present study.
33. Conley RT (1966) Infrared spectroscopy. Allyn & Bacon, Boston
34. Nakamoto K (1997) Infrared and Raman spectra of inorganic and
coordination compounds, parts A and B, 5th edn. Wiley, New
York
References
35. Lever ABP (1984) Inorganic electronic spectroscopy, 2nd edn.
Elsevier, Amsterdam
36. Batra G, Mathur P (1994) Trans Met Chem 19:160
37. Sen S, Mitra S, Luneau D, El Fallah MS, Ribas J (2006) Polyhedron
25:2737
1. Pouralimardan O, Chamayou AC, Janiak C, Monfared HH (2007)
Inorg Chim Acta 360:1599
2. Geubeur I, Guekezian M, Terra LHSA, Moraes MCB, Lago CL,
´
Matos JR, Suarez-Iha ME (2004) Polyhedron 23:2095
123