S.  Kar, Sarkar, B., Ghumaan, S., Janardanan, D., van Slageren, J., Fiedler, J., Puranik, V. G., Sunoj, R. B., Kaim, W., and Lahiri, G. Kumar, ?2,5-dioxido-1,4-benzoquinonediimine (H2L2-), a hydrogen-bonding noninnocent bridging ligand related to aminated topaquinone: different oxidation state distributions in complexes [(bpy)(2)Ru(2)(mu-H2L)](n) (n=0,+,2+,3+,4+) and [(acac)(2)Ru(2)(mu-H2L)]?, Chemistry - a European Journal, vol. 11, no. 17, pp. 4901-4911, 2005.

A.  Nayak, Patra, S., Sarkar, B., Ghumaan, S., Puranik, V. G., Kaim, W., and Lahiri, G. Kumar, ?Tetrazine derived mononuclear Ru-II(acac)(2)(L)(1), [Ru-II(bpy)(2)(L)](ClO4)(2)(2) and [Ru-II(bpy)(L)(2)](ClO4)(2)(3) (L=3-amino-6-(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine, acac = acetylacetonate, bpy=2,2 '-bipyridine): syntheses, structures, spectra?, Polyhedron, vol. 24, no. 2, pp. 333-342, 2005.

S.  Maji, Sarkar, B., Patra, S., Fiedler, J., Mobin, S. M., Puranik, V. G., Kaim, W., and Lahiri, G. Kumar, ?Metal-induced reductive ring opening of 1,2,4,5-tetrazines: Three resulting coordination alternatives, including the new non-innocent 1,2-diiminohydrazido(2-) bridging ligand system?, Inorganic Chemistry, vol. 45, no. 3, pp. 1316-1325, 2006.