S-allyl-b-N-[(2-hydroxyphenyl)methylene]hyrazinecarbodithioate) (1, H2L), the Schiff base of dithiocarbazate with unsatd. allyl substitution, can act as a new tridentate SNO ligand H2-L and react with cobalt(II) nitrate hexahydrate to form the novel linear trinuclear isovalence Co(II) complex, [Co3(H-L)2(L)2] 2C2H5OH (2). The compds. were characterized by elemental anal., IR, and UV spectroscopy. Compd. 2 was also characterized by single-crystal X-ray anal. and crystallizes in the orthorhombic space group, Pbcn, with a = 30.643(1) .ANG., b = 9.118(4) .ANG., c = 19.017(7) .ANG., a = b = g = 90°, V = 5312.95 .ANG.3, Z = 4, and R 1 = 0.0790, (wR 2) = 0.1223. The six-coordinate central Co(II) atom is bonded to two deprotonated metal-contg. ligands. The terminal Co(II) atoms are in a square planar SNON four-coordinate environment and connected to the central Co(II) by N-atoms from the ligand backbone. For quantifying the intermol. interactions in crystal lattice, the new d norm surface and the breakdown of fingerprint plots have been used for visualizing and exploring the compd. 2.

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