Bs. Hammes et Cj. Carrano, Structure and physical properties of several pseudotetrahedral zinc complexes containing a new alkyl thiolate heteroscorpionate ligand, J CHEM S DA, (19), 2000, pp. 3304-3309
Citations number
38
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
A series of pseudotetrahedral and octahedral zinc(II) complexes of the hete
roscorpionate ligand bis(3,5-dimethylpyrazolyl)(1-methyl-1-sulfanylethyl)me
thane (L3SH) have been synthesized and most characterized by X-ray crystall
ography. Pseudotetrahedral complexes isolated include [Zn(L3S)(CH3)], [Zn(L
3S)(Cl)], [Zn(L3S)(OAc)], [Zn(L3S)(SPhF5)], [Zn(L3S)(SBz)] (Bz = CH2Ph), [Z
n(L3S)(OPhp-NO2)], and [Zn(L3S)(2)]. In addition, the octahedral complex [Z
n-2{(L3S)(2)Zn}{O2P(OPh)(2)}(4)] was also synthesized. Comparisons between
these complexes and those of the corresponding tris(pyrazolyl)borate, Tp(-)
, or aromatic phenol or benzenethiolate ligands (L1O)(-) and (L2S)(-) revea
l significant differences. Among these is a change in binding of acetate fr
om pure unidentate to anisobidentate as the ligand donor is changed from S
to N to O. Trends such as these may aid in understanding how the donor set
affects the structure and reactivity at pseudotetrahedral zinc centers in m
etalloproteins.