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Di-μ-iodido-bis{[dicyclohexyl(phenyl)-phosphine-κP](pyridine-κN)silver(I)}

- Omondi, Bernard, Meijboom, Reinout

N-Benzyl-P-(2-ethylphenyl)-P-phenylphosphinic amide

- Kinfe, Henok H., Hamese, Augustine, Hughes, Tanya, Omondi, Bernard

Tetra-µ-acetato-κ⁸O:O'-bis[(3,5-dimethyl-1H-pyrazole-κN²)copper(II)]

- Van Wyk, Juanita, Omondi, Bernard, Darkwa, James

  • Authors: Van Wyk, Juanita , Omondi, Bernard , Darkwa, James
  • Date: 2011
  • Subjects: X-ray crystallography , Crystallography , Pyrazolyl ligands , Palladium compounds
  • Type: Article
  • Identifier: uj:5908 , ISSN 1600-5368 , http://hdl.handle.net/10210/8067
  • Description: Pyrazolyl ligands containing a carbonyl linker has been utilized to prepare a number of coordination compounds with palladium salts (Guzei et al., 2003; Mohlala et al., 2005, Ojwach et al., 2005). In these compounds the pyrazolyl carbonyl moiety appear to be robust enough to avoid hydrolysis. However in a few instances the presence of metal ions like Cu(II) (Deka et al., 2006) and Pd(II) (Nelana et al., 2008) appear to catalyze the hydrolysis of the benzoyl fragments. We have observed similar hydrolysis when reacting copper(II) acetate with (3,5-dimethyl-pyrazol-1-yl)-o-benzoyl-methane. The title compound formed from this reaction is the subject of this report. The half "solvent" molecule excluded from the structure had a total number of 30.7 electrons which is approximately half the total number of electrons that acetophenone has. Compound (I) crystallizes with two half molecules in the assymetric unit. The compound is dinuclear with each of the Cu atoms coordinated to four O atoms and a N atom from the pyrazole ligand. The O atoms are from acetate ions, all in the equatorial positions of a slightly distorted octahedral geometry around the Cu atoms. The N atom is bound trans to the Cu—Cu vector completing a the distorted octahedral geometry as axial ligands. The crystal structure of (I) is composed of two N—H···O hydrogen bonded chains (Table 1) that extend in the crystallographic b axis (Fig. 2).
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tert-Butyl 2-hydroxy-3-(4-methylbenzenesulfonamido) butanoate

- Fadlalla, Mohamed I., Friedrich, Holger B., Maguire, Glenn E. M., Omondi, Bernard

Bis[dicyclohexyl(phenyl)phosphane-κP]- silver(I) perchlorate dichloromethane monosolvate

- Munyaneza, Apollinaire, Meijboom, Reinout, Omondi, Bernard

trans-Carbonylchloridobis[dicyclohexyl-(4-isopropylphenyl)phosphane]- rhodium(I) acetone monosolvate.

- Makhoba, Sizwe, Muller, Alfred, Meijboom, Reinout, Omondi, Bernard

Isomorphism in monomeric 1:3 complexes of silver(I) salts with tri-p-tolylphosphine.

- Omondi, Bernard, Venter, Gertruida J. S., Roodt, Andreas, Meijboom, Reinout

Bis(dicyclohexylphenylphosphine)- silver(I) nitrate

- Burgoyne, Andrew R., Meijboom, Reinout, Muller, Alfred, Omondi, Bernard

Di-μ-thiocyanato-bis[bis(tri-p-tolylphosphine) silver(I)] 0.35-hydrate

- Khumalo, Nozipho M., Meijboom, Reinout, Muller, Alfred, Omondi, Bernard

(μ-Ethane-1,2 diamine-κ²N:N’)bis-[dicarbonyl(η⁵-cyclopentadienyl)iron(II)] bis(tetrafluoridoborate)

- M’thiruaine, Cyprian M., Friedrich, Holger B., Changamu, Evans O., Omondi, Bernard

[Bis(pyridin-2-ylmethyl) ether]- trichloridorhodium(III) dichloromethane monosolvate : unusual hydrolysis of the methylene bridge in (pyrazolylmethyl)- pyridine

- Ojwach, Stephen O., Omondi, Bernard, Darkwa, James

2-(Thiophen-2-yl)-N-(4-{(E)-[2-(thiophen- 2-yl)ethyl]iminomethyl}benzylidene)- ethanamine

- Chiririwa, Haleden, Meijboom, Reinout, Omondi, Bernard

2,6-Bis(tosyloxymethyl)pyridine.

- Komarsamy, Lynette, Bala, Muhammad D., Friedrich, Holger B., Omondi, Bernard

(2R,3S)-Methyl 2-hydroxy-3-(4-methylbenzenesulfonamido)- 3-phenylpropanoate

- Fadlalla, Mohamed I., Friedrich, Holger B., Maguirea, Glenn E. M., Omondi, Bernard

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