The field of heteropolymetallic complexes is of current interest in connection with the structures and roles of polymetallic active sites in biological systems [1], and the design of new molecular materials with magnetic, optical and electrical properties [2,3]. Among various relevant systems, oxamido-bridged polynuclear complexes [2,4] and phenolato-oxygen-bridged macrocyclic complexes [5,6] r...

Two new examples of mixed metal copper(I) sulfites, namely, Na3Mn2Cu(SO3)4(H2O)5 (1) and NaMn4Cu(SO3)5(H2O)3 (2), have been synthesized and structurally characterized. The 1D structure of 1 is built from a chain of [Mn2Cu(SO3)4]3- bridged by Na+ ions whereas the structure of 2 features a complicated 3D framework in which Mn8O36 octanuclear clusters are bridged by sulfite anions and copper(I) io...

Isomerization, Reactivity, and Structural study of a Thioperoxide-bridged Dimolybdenum(V) Dimer Chi Minh Tuong April 8, 2004 The synthesis of the methyl thioperoxide-bridged dimolybdenum(V) dimer, structurally characterized by crystallography. The compound proved to be very stable to light and heat. The possibility of photolytic or thermolytic rearrangement of the methyl thioperoxide ligand (u-...

tow new compound of type [(chelate)2cu-oh-cu(chelate)2] x3.nh2o, where chelate=1,10-phenanthroline; x=cl¯(n=3.5) and chelate=4,4'-dimethyl-2,2'-bipyridine;  (n=5) have been synthesized and their properties investigated. the complexes show room temperature magnetic moment order of 1.0 b.m. per copper atom. the x-band esr spectrum of powdered samples at room temperature shows typical dm=1 transit...

The title compound, C(26)H(24)N(2)O(3), was synthesized by reduction of the corresponding Schiff base. The mol-ecule does not possess crystallographic or non-crystallographic symmetry. The dihedral angle between the oxygen-bridged benzene rings is 67.98 (8)°. Both hydroxyl groups are involved in O-H⋯O intra-molecular hydrogen bonding. The mol-ecules are linked into a two-dimensional network par...

Nonempirical quantum chemical ST0-3G calculations were performed for cluster models of two oxygen-bridged T0 4 tetrahedra (T = Si, Al). The models are based on [(H0)3T0T(0H)3]"structures and, in case of Al-containing models (n = 1,2), their electric neutrality is ensured by adding positive point charges. The calculations suggest the occurrence of X4.I — O —Al^ pairings provided certain electric...

Grogan and Rice reported a number of imides of epoxyisoindole sort. Some pharmacological testing was performed which revealed their bioactivity. Except of their work, only scattered examples of derivatives with oxygen-bridged ring have appeared in the literature; this approach has also been used by us in the synthesis of some new potential drugs. This paper reports the synthesis of a number of ...

A new two-dimensional (2D) coordination polymer of the formula {Cu(ox)(4-Hmpz)·1/3H2O}n (1) (ox = oxalate and 4-Hmpz 4-methyl-1H-pyrazole) has been prepared, its structure determined by single-crystal X-ray diffraction. It consists corrugated oxalato-bridged copper(II) neutral layers featuring two alternating bridging modes group within each layer, symmetric bis-bidentate (?-?2O1,O2:?2O2?,O1?) ...