A series of mononuclear salen-supported gallium amido/alkoxide derivatives were prepared and structurally characterized and subsequently used as initiators in rac-lactide ring-opening polymerisation (ROP). The reaction of variously substituted salen ligands (1a-1f) with 0.5 equiv. of Ga2(NMe2)6 allowed the isolation of the corresponding (salen)Ga-NMe2 chelates (2b-2d, 2f) via an amine eliminati...

In the title heterodinuclear salen-type complex, [CuDy(C(19)H(20)N(2)O(4))(NO(3))(3)]·CH(3)OH, the copper(II) ion is tetra-coordinated by two imino N atoms [Cu-N = 1.961 (4) and 1.968 (4) Å] and two phenolate O atoms [Cu-O = 1.931 (3) and 1.938 (3) Å] in a planar geometry. The ten-coordin-ate Dy(III) ion is ligated by six O atoms of three nitrate groups and four O atoms from the ligand [Dy-O = ...

Arsenite (As(III)) oxidation by manganese oxides (Mn-oxides) serves to detoxify and, under many conditions, immobilize arsenic (As) by forming arsenate (As(V)). As(III) oxidation by Mn(IV)-oxides can be quite complex, involving many simultaneous forward reactions and subsequent back reactions. During As(III) oxidation by Mn-oxides, a reduction in oxidation rate is often observed, which is attri...

We have synthesized the first {Mn( iii )OH} complex in an all O-donor environment K 2 [Mn(OH)(pin F ) ], 3, formed by deprotonation of corresponding )OH } complex, K[Mn(OH )(pin 1. Complex 3 oxidizes substrates with weak N–H and O–H bonds.

A chiral Zn(II)–salen complex tethered with poly(ethylene glycol) (PEG) was synthesized. This soluble polymer-supported complex was found to catalyze the asymmetric addition of diethylzinc to a series of aromatic aldehydes in good yields and with good enantiomeric ratio (er). The PEG-supported catalyst could be recycled and reused up to three times. The reactivity and selectivity of the catalys...

The asymmetric unit of the title complex, {[Mn(C(20)H(10)Br(2)N(3)O(5))(H(2)O)]·(CH(3))(2)NCHO}(n), consists of one Mn(III) ion, one (E)-5-bromo-N-[2-(5-bromo-2-oxidobenzyl-idene-amino)-4-nitro-phen-yl]-2-oxidobenzamidate ligand (Schiff base), one water mol-ecule and an N,N-dimethyl-formamide mol-ecule. The coordination geometry around the Mn(III) ion is a distorted octa-hedron, being surrounde...

In the title complex, [Co(C(22)H(18)N(2)O(4))(CN)(H(2)O)]·CH(3)CN, the Co(III) ion is six-coordinated in a distorted octa-hedral environment defined by two N atoms and two O atoms from a salen ligand in the equatorial plane and one O atom from a water mol-ecule and one C atom from a cyanide group at the axial positions. O-H⋯O hydrogen bonds connect adjacent complex mol-ecules into dimers. C-H⋯N...

An unusual [Mn(IV)Gd(III)(2)(mu(3)-O(2-))](8+) triangular complex has been prepared from the initial use of 2,6-diacetylpyridine dioxime (dapdoH(2)) in 3d/4f cluster chemistry. The complex has an S = (13)/(2) ground state, with exchange parameters J = +0.49 cm(-1) and J' = -0.12 cm(-1) [H = -2J(S(i) x S(j)) convention] for the Gd(III)...Mn(IV) and Gd(III)...Gd(III) interactions, respectively. T...

The initial employment of alpha-benzoin oxime (bzoxH(2)) in higher oxidation state 3d metal cluster chemistry has provided access to a new enneanuclear Mn(III) complex with an unprecedented metal-core topology consisting of two triangular [Mn(3)(mu(3)-Omicron(2-))(mu-OmicronNu)(3)](4+) fragments connected by a linear [Mn(3)(mu-OmicronNu)(6)](3+) unit. The Mn(III)(9) cluster is antiferromagnetic...