Inclusion Compounds Formed between Hofmann-(1,9-diaminononane)-type Host and Aromatic Guest

IR spectra of three tetracyanonickelate complexes with 1,9-diaminononane as ligand and three of their clathrates with guest nitrobenzene are presented. It is shown that they have similar structures and exhibit weak hydrogen bonding between the pi-electron cloud of aromatic guest and the ligand of the host lattice which is observed in all clathrates. A second type of hydrogen bonding is present between the NO2 of nitrobenzene and the cyanide group of the lattice. The cyanide vibrational frequencies in the present clathrates are found to be in the order Cd-Ni-NB < Co-Ni-NB < Ni-Ni-NB due to increase in second ionization potential of outer metal ion. Declathration by heating shows that after the elimination of guest, the host lattice is stable since the IR spectra of the heated clathrate sample is the same as it's host. So there is only a very weak hydrogen bonding between the host and guest. These empty sites of host are occupied by moisture and retained as clathrated water. The host lattices are found to be similar to those of Hofmann-α,ω-diamino long chain alkane clathrates. The stability of these compounds are based on H-bonds involving NO2 of nitrobenzene, pi cloud of the guest and the cyanide moieties

Anthraquinone pigments of Barleria buxifolia Linn

456-45

Stereotactic ablative body radiotherapy for the treatment of spinal oligometastases

Abstract not availableJ.H. Chang, S. Gandhidasan, R. Finnigan, D. Whalley, R. Nair, A. Herschtal, T. Eade, A. Kneebone, J. Ruben, M. Foote, S. Siv

A new isoflavone from <i style="">Dalbergia rubiginosa</i> (Roxb)

1282-1284A new isoflavone, characterized as 5-hydroxy-6,7-dimethoxy-3',4'-methylenedioxyisoflavone 1 by chemical and spectral studies, along with nitiducarpin, -sitosterol and oleanolic acid, has been isolated from the roots of Dalbergia rubiginosa

Cytotoxic effect of 2,3-disubstituted chromanones in human cancer cell lines

173-175Four different synthetic compounds [3-aryl-2-(3- pyridyl)chromanones) were prepared and screened for cytotoxicity against a panel of 29 human cancer cell lines in five different concentrations separately. All compounds displayed cytotoxicity against cancer cell lines and one of them possessed cell type selectivity also

Synthesis and characterization and anti-inflammatory and antibacterial evaluation of 3-arylidene-7-methoxychroman-4-ones

1202-12073-Arylidene-7-methoxychroman-4-ones 3a-k have been prepared from 7-methoxy-chroman-4-one 1 and heterocyclic aldehydes 2 and have been evaluated for anti-inflammatory and antibacterial activities. All of them have registered moderate anti-inflammatory and antibacterial activities

Two 2-naphthoic acids from <i style="">Diospyros paniculata</i>

1544-1546Phytochemical investigation of the heartwood, root and stem of Diospyros paniculata results in the isolation of 2-naphthoic acids 1 and 2, 2-naphthaldehydes, naphthoquinones, steroids and terpenoids