Different coordination modes of trans-2-{[(2-methoxyphenyl)imino]methyl}phenoxide in rare-earth complexes: influence of the metal cation radius and the number of ligands on steric congestion and ligand coordination modes.

A simple and effective synthetic route to homo- and heteroleptic rare-earth (Ln = Y, La and Nd) complexes with a tridentate Schiff base anion has been demonstrated using exchange reactions of rare-earth chlorides with in-situ-generated sodium (E)-2-{[(2-methoxyphenyl)imino]methyl}phenoxide in different molar ratios in absolute methanol. Five crystal structures have been determined and studied, namely tris(2-{[(2-methoxyphenyl)imino]methyl}phenolato-κO,N,O)lanthanum, [La(CHNO)], (1), tris(2-{[(2-methoxyphenyl)imino]methyl}phenolato-κO,N,O)neodymium tetrahydrofuran disolvate, [La(CHNO)]·2CHO, (2)·2THF, tris(2-{[(2-methoxyphenyl)imino]methyl}phenolato)-κO,N,O;κO,N,O;κN,O-yttrium, [Y(CHNO)], (3), dichlorido-1κCl,2κCl-μ-methanolato-1:2κO:O-methanol-2κO-(μ-2-{[(2-methoxyphenyl)imino]methyl}phenolato-1κO,N,O:2κO)bis(2-{[(2-methoxyphenyl)imino]methyl}phenolato)-1κO,N,O;2κO,N,O-diyttrium-tetrahydrofuran-methanol (1/1/1), [Y(CHNO)(CHO)Cl(CHO)]·CHO·CHO, (4)·MeOH·THF, and bis(μ-2-{[(2-methoxyphenyl)imino]methyl}phenolato-1κO,N,O:2κO)bis(2-{[(2-methoxyphenyl)imino]methyl}phenolato-2κO,N,O)sodiumyttrium chloroform disolvate, [NaY(CHNO)]·2CHCl, (5)·2CHCl. Structural peculiarities of homoleptic tris(iminophenoxide)s (1)-(3), binuclear tris(iminophenoxide) (4) and homoleptic ate tetrakis(iminophenoxide) (5) are discussed.

Isomorphous rare-earth bis[bis(2,6-diisopropylphenyl)phosphate] complexes and their self-assembly into two-dimensional frameworks by intramolecular hydrogen bonds.

The crystal structures of rare-earth diaryl- or dialkylphosphate derivatives are poorly explored. Crystals of bis[bis(2,6-diisopropylphenyl)phosphato-κO]chloridotetrakis(methanol-κO)neodymium methanol disolvate, [Nd(CHOP)Cl(CHO)]·2CHOH, (1), and of the lutetium, [Lu(CHOP)Cl(CHO)]·2CHOH, (2), and yttrium, [Y(CHOP)Cl(CHO)]·2CHOH, (3), analogues have been obtained by reactions between lithium bis(2,6-diisopropylphenyl)phosphate and LnCl(HO) (in a 2:1 ratio) in methanol. Compounds (1)-(3) crystallize in the C2/c space group.

Two new species of fungus gnats (Diptera: Mycetophilidae) from Kunashir Island, Kuril Islands.

Two new species of Mycetophilidae (Diptera), Clastobasis subalternans sp. n. and Phthinia kurilensis sp.

Crystal structure of [bis-(2,6-diiso-propyl-phen-yl) phosphato-κO]tris-(methanol-κO)lithium methanol monosolvate.

Crystals of the title compound, [Li{OOP(O-2,6-(i)Pr2C6H3)2}(CH3OH)3]·CH3OH or [Li(C24H34O4P)(CH3OH)3]·CH3OH, have been formed in the reaction between HOOP(O-2,6-(i)Pr2C6H3)2 and LiOH in methanol. The title compound is of inter-est as it represents the first reported crystal structure of the family of lithium phosphate diesters. The {Li(CH3OH)3[O2P(O-(i)Pr2C6H3)2]} unit displays the Li atom in a slightly distorted tetra-hedral coordination environment and exhibits one intra-molecular O-H⋯O hydrogen bond between a coordinating methanol mol-ecule and the terminal non-coordinating O atom of the phosphate group.