Reaction of PhC(X)(COH) (X = OH, NH) with [VO(OR)] (R = Et, Pr): structure, magnetic susceptibility and ROP capability.

Reaction of [VO(OR)] (R = Et, Pr) with 2,2'-diphenylglycine afforded the alkoxide-bridged dimers {[VO(OR)(μ-OR)][PhC(NH)(CO)]}, whereas use of benzilic acid, in the presence of alkali metals, afforded 16-membered metallocycles {V(O)M(OR)[PhC(OH)(CO)]} (M = <1 Na, K). For the ring systems, magnetic susceptibility data is consistent with mixed-valence vanadium with an average oxidation state of 3.5.

Mixed-magnesium/zinc calix[4]arene complexes: structure, and ring opening polymerisation studies.

Different combinations of organomagnesium reagents and zinc bromide react with either 1,3-dimethoxy-4--butylcalix[4]areneH (L(OMe)H) or trialkoxycalix[4]arenes (L(OR)H) (R = -Pr, -pentyl) to afford mixed-metal calix[4]arene systems. Intriguing molecular structures are formed and the systems are capable of the ring opening polymerisation of ε-caprolactone under N, air, or as melts.

Trinuclear zinc calix[4]arenes: synthesis, structure, and ring opening polymerization studies.

The trinuclear zinc calix[4]arene complexes [Zn(OCCH)(L(O)(OMe))·MeCN ( = 7.5, 1; = 6, 1'), [Zn(OCCH)(L(O)(OPr))·5MeCN (2·5MeCN), [Zn(OEt)(L(O)(OMe))]·4MeCN (3·4MeCN), [Zn(OEt)(L(Opentyl))]·4.5MeCN (4·4.

Vanadyl sulfates: molecular structure, magnetism and electrochemical activity.

Reaction of differing amounts of vanadyl sulfate with p-tert-butylthiacalix[4]areneH4 and base allows access to the vanadyl-sulfate species [NEt4]4[(VO)4(μ3-OH)4(SO4)4]·½H2O (1), [HNEt3]5[(VO)5(μ3-O)4(SO4)4]·4MeCN (2·4MeCN) and [NEt4]2[(VO)6(O)2(SO4)4(OMe)(OH2)]·MeCN (3·MeCN). Similar use of p-tert-butylsulfonylcalix[4]areneH4, p-tert-butylcalix[8]areneH8 or p-tert-butylhexahomotrioxacalix[3]areneH3 led to the isolation of [HNEt3]2[H2NEt2]2{[VO(OMe)]2p-tert-butylcalix[8-SO2]areneH2} (4), [HNEt3]2[V(O)2p-tert-butylcalix[8]areneH5] (5) and [HNEt3]2[VIV2VV4O11(OMe)8] (6), respectively. Dc magnetic susceptibility measurements were performed on powdered microcrystalline samples of 1-3 in the T = 300-2 K temperature range.

Vanadyl complexes bearing bi-dentate phenoxyimine ligands: synthesis, structural studies and ethylene polymerization capability.

Reaction of [VO(OnPr)3] with the Schiff bases 3,5-(tBu)2-2-OH-C6H2CH(N(x-OR-C6H4)) (R = Me; x = 2, L(1)H; x = 3, L(2)H; x = 4, L(3)H; R = Et (L(4)H), CF3 (L(5)H), Ph (L(6)H)) or 4-methyl-3-(R)-2-(OH)-C6H4C[double bond, length as m-dash]N(2'-(2''-(OR1)C6H4)C6H4) (R = adamantyl, R(1) = Ph (L(7)H) or R = C(Me)2Ph, R(1) = Ph (L(8)H)) afforded the bis(chelate) vanadium(iv) complexes [VO(L(n))2] (n = 1 (1·2MeCN); n = 2 (2); n = 3 (3·2MeCN); n = 4 (4); n = 5 (5); n = 6 (6); n = 6, (7·1.5MeCN); n = 7, (8); n = 8, (9)); in the case of L(6)H, the oxo-bridged vanadium(v) complexes [VO(μ-O)(L(6))]2 (10) was also isolated. By contrast, interaction of 4-methyl-3-(R)-2-(OH)-C6H4C[double bond, length as m-dash]N(2'-(2''-(OR1)C6H4)C6H4) (R = adamantyl, R(1) = Me (L(9)H); R = tBu, R(1) = Me (L(10)H); R = C(Me)2Ph, R(1) = Me (L(11)H)) with [VO(OnPr)3] led to the isolation of the dinuclear complexes [VO(μ-OH)(μ-OnPr)(L(n))]2 (n = 9, (·4MeCN); 10, (12); 11, (13)), respectively.

Cellular uptake studies of two hexanuclear, carboxylate bridged, zinc ring structures using fluorescence microscopy.

Two hexanuclear zinc complexes have been structurally characterized, and evaluation against several cells showed selective toxicity. Cellular uptake revealed a non-specific process, resulting in accumulation within the cell cytoplasm.

5,7-Dihy-droxy-3,6-dimeth-oxy-2-(4-meth-oxy-phen-yl)-4H-chromen-4-one monohydrate.

The title compound, C(18)H(16)O(7)·H(2)O, is a flavonoid isolated from Dodonaea viscosa-. The benzopyran ring system of the flavonoid is essentially planar [maximum deviation = 0.025 (2) Å] and inclined at 5.

7-[2-(3-Fur-yl)eth-yl]-7,8-dimethyl-3,5,6,6a,7,8,9,10-octa-hydro-1H-naphtho-[1,8a-c]furan-3-one.

In the title mol-ecule, C(20)H(26)O(3), a clerodane diterpenoid isolated from Dodonaea viscosa-, the trans-fused six-membered rings of the deca-line system display chair conformations. The five-membered lactone ring adopts an envelope conformation and the five-membered furan ring is essentially planar with a maximum deviation of 0.0052 (12) Å.