Biomedical subjects

Brian T Holmes

Publications and source records attributed to Brian T Holmes.

2 recordsLinked to original sources

PubMed2003

1,2,4,5-tetrakis(2-vinylpyridyl)-benzene-dichloromethane (1/2).

The title compound, C(34)H(26)N(4) x 2CH(2)Cl(2), lies about an inversion center. The solvent molecules interact with the benzene molecule both through C-H...N hydrogen bonding to span pyridine N atoms of adjacent vinyl groups, possibly stabilizing the rotational conformation observed, and through a pi interaction between a dichloromethane Cl atom and a pyridyl ring C-C bond of a c-glide-related molecule. The benzene molecules form stacks along the a axis such that two of the four olefin groups are properly oriented for photoreactivity (2+2 cyclodimerization).

Journal Article↗

PubMed2002

2,6-Diiodopyridine.

The title compound, C(5)H(3)I(2)N, crystallizes in the polar space group Fmm2, with crystallographic mm2 symmetry imposed on the molecule. Molecules are linked through C-H...N hydrogen bonding to form chains which are, in turn, joined through weak I...I halogen-bonding interactions to form layers. The pyridine ring lies parallel to the polar z axis and has the N atom pointing in the +z direction. The layers stack in a polar fashion normal to the a axis and the absolute structure has been determined.

Journal Article↗