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A series of heteroleptic lanthanide complexes [LnL3·Dipy] and [LnL3·Phen] (Ln = La – Nd, Sm – Yb, Dipy – α,α’-dipyridile, Phen – 1,10-phenantroline, HL (CAPh type ligand) = dimethyl-N-trichloracetylamido-phosphate, CCl3C(O)NHP(O)(OCH3)2) has been synthesized. The complexes have been characterized by means of the elemental analyse, X-ray diffraction, FT-IR and NMR spectroscopy. Crystal structure of [ErL3·Dipy] has been determined. Cell edge parameters: a = 11.9821(7) Å, b = 21.459(1) Å, c = 31.985(2) Å, β = 96.096(1)°, V =8177.8(8) Å3, Z=8, monoclinic, space group C2/c. Two CAPh ligands are coordinated via oxygen atoms of phosphoryl and carbonyl groups, forming six-membered cycles. The Ln- O(P) bonds are shorter than the Ln-O(C) bonds because of stronger affinity of the phosphoryl group for lanthanides. The Lippard-Russ and δ-criterions were used to characterize the erbium ion coordination polyhedron, it can be described as an distorted Hoard’s dodecahedron, mgg+m isomer.

A row of new lanthanide CAPh-type ligand based anionic tetrakis-complexes of general formula NEt4[LnL4] (Ln = La, Nd, Eu, Gd, Tb, Lu; HL=С6H5CONHPO(ОC6H5)2) have been synthesized. The ligands bidentate-chelating mode of coordination with formation of anionic tetrakis-complexes was proposed based on elemental analysis and IR, NMR and absorption spectroscopies data. The obtained europium and terbium complexes exhibit sensitized by CAPh ligands intense emission with decay time 1.7 і 2.0 ms respectively. For the europium complex the emission quantum yield was found to be equal 37% and the europium emission sensitization by organic ligand equals 56%.

A series of cationic complexes [Ln(Pip)2(Ph3PO)3]B(Ph)4·2H2O (Ln(III) = La, Nd, Еu, Lu; HPip (CAPh type ligand) = 2,2,2-trichloro-N-(dipiperidin-1-yl-phosphoryl)acetamide) has been synthesized. The complexes have been characterized by means of the X-ray diffraction, FT-IR spectroscopy and elemental analyse. Crystal structure of [Lа(Pip)2(Ph3PO)3] B(Ph)4·2H2O has been determined. Cell edge parameters: a = 15.3820 Å, b = 15.2050 Å, c =44.8980 Å, β = 92.98°, V = 10486.7Å3, space group P 21/c. Two CAPh ligands are coordinated via oxygen atoms of phosphoryl and carbonyl groups, forming six-membered cycles Schemes of [Lа(Pip)2(Ph3PO)3]BPh4·2H2O dissociation in nonaqueous solvents: acetone and methanol has been investigated. To determine the type of electrolyte value of electric conductivity at infinite dilution (λ0) was calculated.

Stato-coordinative disorders are one of main clinical symptoms of tumors of posterior cranial fossa. Computer stabilography (CS) is the method for integral valuation of statokinetic system state, and allows to detect and objectify it’s malfunctions. At tumors of different genesis it’s reasonable to use CS in diagnostic complex in order to examine the pathogenesis mechanism of vestibular disorders and their compensation level. CS method application has large diagnostic opportunities that ground the necessity of further accumulation of clinical material and it’s analysis.