A CR-structure on a smooth real manifold M of dimension m is a smooth distribution of subspaces in the tangent spaces T c p (M) ⊂ Tp(M), p ∈ M , with operators of complex structure Jp : T c p (M) → T c p (M), J 2 p ≡ −id, that depend smoothly on p. A manifold M equipped with a CR-structure is called a CR-manifold. It follows that the number CRdimM := dimCT c p (M) does not depend on p; it is ca...

Spontaneous neuronal activity plays an important role in the development of cortical circuitry, yet its spatio-temporal dynamics are poorly understood. Cajal-Retzius (CR) neurons in developing layer 1 are necessary for correct cortical lamination and are strategically located to coordinate early circuit activity. To characterize the spontaneous activity of CR and other layer 1 neurons during co...

The ionic title complex, [Cu(C(4)H(13)N(3))(2)](2)[Cr(NCS)(4)(NH(3))(2)](3)(NCS)·14C(2)H(6)OS·H(2)O, consists of complex [Cu(dien)(2)](2+) cations [dien is N-(2-amino-eth-yl)ethane-1,2-diamine], com-plex [Cr(NCS)(4)(NH(3))(2)](-) anions, an NCS(-) counter-anion and uncoordinated dimethyl sulfoxide (DMSO) and water solvent mol-ecules. One of the Cr atoms lies on an inversion center, while the se...

Continuing the study of the complex indicatrix IzM , approached as an embedded CR hypersurface on the punctual holomorphic tangent bundle of a complex Finsler space, we study in this paper the almost contact structures that can be introduced on IzM . The Levi form and characteristic direction of the complex indicatrix are given and the CR distributions integrability is studied. Using these we c...

Dinitrogen complexes of the type Tp(R,R)Cr-N2-CrTp(R,R) are not the most labile precursors for Cr(i) chemistry, as they are sterically protected from obligatory associative ligand substitution. A mononuclear alkyne complex - Tp(tBu,Me)Cr(η(2)-C2(SiMe3)2) - proved to be much more reactive.

The kinetics and mechanism of the redox reaction between [Fe(II)(CN)(6)](4-) and the macrocyclic ligand complex [CrClL(15)](2+) (L(15) = 6-methyl-1,4,8,12-tetraazacyclopentadecane-6-amine) has been studied at different pH values. In acidic solution, the expected redox process occurs with no formation of any of the possible Cr(III)/Fe(II) mixed valence complexes, as those seen for the Co(III) sp...

We prove a smooth version of the classical Schwarz reflection principle for CR mappings between an abstract CR manifold M and a generic CR manifold embedded in euclidean complex space. As a consequence of our results, we settle a conjecture of X. Huang formulated in [Hu2].

We prove that for an induced CR structure on a compact, generic, regular 3-pseudoconcave CR submanifold M ⊂ G, of a complex manifold G, satisfying condition dimH1 ( M, T ′(G)| M ) = 0 all the close CR structures are induced by close embeddings.

A new family of relatively stable Cr(V) complexes, [Cr(V)O(L)(2)](-) (LH(2) = RC(O)NHOH, R = Me, Ph, 2-HO-Ph, or HONHC(O)(CH(2))(6)), has been obtained by the reactions of hydroxamic acids with Cr(VI) in polar aprotic solvents. Similar reactions in aqueous solutions led to the formation of transient Cr(V) species. All complexes have been characterized by electron paramagnetic resonance spectros...