David A. Grossie

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Sydnones are unusual mesoionic compounds containing a five-membered heterocyclic ring. Generally for stability, substitution at the N-3 position by an aromatic fragment is necessary. In the title compound, C(10)H(9)N(3)O(3), the aromatic substitutent is 2-acetamido-phenyl. The two planar ring fragments are twisted relative to one another, with a(More)
Platinum group metals (PGMs), i.e., palladium (Pd), platinum (Pt) and rhodium (Rh), are found at pollutant levels in the environment and are known to accumulate in plant and animal tissues. However, little is known about PGM toxicity. Our previous studies showed that chick embryos exposed to PGM concentrations of 1mL of 5.0ppm (LD50) and higher exhibited(More)
The asymmetric unit of the title compound, (C(23)H(33)N(2))[Li(C(32)H(16)N(8))]·0.5C(3)H(6)O·H(2)O, consists of two symmetry-unrelated lithium phthalocyanine (LiPc(-)) half-anions, centered at (1,0,0) and (0,,0), respectively, the bis-(adamant-yl)imidazolium cation (BAI(+)), occupying a general site, an acetone mol-ecule, disordered about the inversion(More)
In the title compound, C(12)H(8)F(2)O(2)S, which is a precursor of functionalised poly(aryl-ene ether sulfone) polymers, the dihedral angle between the aromatic ring planes is 84.43 (8)°. In the crystal structure, aromatic π-π stacking [centroid-centroid separations = 3.808 (3) and 3.867 (3) Å] helps to establish the packing. A short C-H⋯F contact also(More)
In general, sydnone compounds are synthesized with an aromatic substituent at the N-3 position and this feature adds to the stability of the mesoionic five-membered heterocyclic ring. In the title compound, C26H19BrN3O2P, the aromatic substitutent is tri-phenyl-phosphine 4-bromo-phenyl-imide. The dihedral angle between the planes of the sydnone and the(More)
Sydnones, which contain a mesoionic five-membered heterocyclic ring, are more stable if synthesized with an aromatic substutuent at the N3 position. In the title compound {sys-tematic name: 4-acetyl-3-[2-(eth-oxy-carbon-yl)phen-yl]-1,2,3-oxa-diazol-3-ylium-5-olate}, C13H12N2O5, the aromatic substitutent is 2-(eth-oxy-carbon-yl)phenyl. Intra- and(More)
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