PubMed Health⌕ Search

Biomedical subjects

DD Ellis

Publications and source records attributed to DD Ellis.

4 recordsLinked to original sources
PubMed2000

Chlorobis(triphenylphosphine)nickel(I) tetrahydrofuran solvate and an unsolvated trigonal phase of chlorotris(triphenylphosphine)nickel(I)

In [NiCl(C(18)H(15)P)(2)].C(4)H(8)O, the Ni atom is coordinated by three ligands in a distorted trigonal-planar configuration, with a P-Ni-P angle of 111.52 (2) degrees. In [NiCl(C(18)H(15)P)(3)], there are three independent molecules in the asymmetric unit, with each Ni-Cl bond on a crystallographic threefold rotation axis. Each Ni centre is tetrahedrally bound. The Ni atoms in both compounds have a d(9) configuration and a formal oxidation state of Ni(I). A comparison is made between the form of [NiCl(PPh(3))(3)] presented here and that of a known toluene solvate.

Journal Article↗
PubMed2000

(2R,3R,5R)-2-

The molecular structures of two chiral cyclohexanones based on R-(-)-carvone, C(17)H(26)O(3), (I), and C(17)H(23)NO, (II), are reported here. The six-membered ring in (I) is in a chair conformation with the two fused five-membered rings of the furofuranyl substituent in a cis configuration. Compound (II) contains a decalin group; one ring has the chair form whilst the other is in a half-boat conformation. Both products have been characterized spectroscopically, however, neither NMR nor IR results could prove the stereochemistry at each chiral centre unambiguously. The crystal analyses were used to examine conformational properties of the compounds.

Journal Article↗