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The purpose of the paper is to summarize theoretical studies in the field of contractual relations implementation in the modern strategies of TNCs economic competition on international product and resource markets, as well as to assess the impact of certain contractual relations types on the macroeconomic dynamics of countries integrated into the global value chains of TNCs. Methodology. Based on the World Bank Open Data and UNCTADSTAT, there was made the assessment of indirect socio-economic and innovative effects of contract production on the macroeconomic indicators of the individual countries development by means of the correlationregression method. Results. The influence of institutional, political, and economic restrictions that restrain the investment activity of international corporations on the international markets of finished and intermediate products is disclosed. A trend that complicates the forms and methods of external expansion in terms of more flexible latent forms, in particular, through contractual relations (subordinate production, licensing, franchising, contract management) is identified. The role of international contractual relations in measuring nonlinear formats of the externalization of TNC business is revealed. Exogenous (related to the institutional environment of the host-countries) and endogenous factors (the sphere of activity, corporate strategy, formed competencies and competitive advantages of the companies) that allow TNCs to obtain competitive advantages from the use of contractual relations in multi-level network structures with coordination mechanisms and management regimes are determined. Practical implications consist in the improvement of a theoretical and methodical approach to assessing international contractual relationships from the positions of microeconomic analysis (means TNC's management strategies) and taking into account macroeconomic effects (means their influence on the macroeconomic development of the contracting and implementing parties is proposed). Value/originality. The article points on problems of expanding the practice of international contractual relations: optimization of taxation, predatory exploitation of human, technological and natural resources of host countries by TNCs, "freezing" of national subcontractors on the stages with low value added, distortion of export capabilities of host countries by products export imitation created by means of the foreign suppliers' give-and-take raw materials and, as a result, the distortion of the balance of payments.

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Photooxidation of the methyl ester (Ib) and octadecyl ester of 3-(3,5-di-tert-butyl-4-hy-droxypheny1)propionic acid (Ic) sensitized with methylene blue gives rise to cyclohexadienone hydroperoxides IIIb or IIIc. The reaction proceeds via singlet oxygen. The photochemical stability of both hydroperoxides was examined in the presence and absence of sensitizer. The thermal decomposition of both hydroperoxides leads to the respective starting phenols Ib or Ic. Oxidation of Ib with lead dioxide yields IV, an effective quencher of singlet oxygen, the effect of which approaches that of /3-carotene. In a neutral medium IV is stable against oxidation. The transformations are investigated with respect to the system of processes occurring in the aging of stabilized polyolefins. ZUSAMMENFASSUNG:Die Cyclohexadienonhydroperoxide IIIb und IIIc entstehen durch methylenblau-sensibilisierte Photooxidation von Methyl-(Ib) und Octadecylester (Ic) der 3-(3,5-Di-tert-butyl-4-hydroxyphenyl)propionsaure. Die Reaktion verlauft uber den Singulett-Sauerstoff. Es wurde die photochemische Stabilitat der beiden Hydroperoxide in Anwesenheit und Abwesenheit des Sensibilisators verfolgt. Beide Hydroperoxide spalten sich thermisch unter Bildung der Ausgangsphenole Ib bzw. Ic. Die Verbindung IV, die einen wirksamen Quencher (Loscher) von Singulett-Sauerstoff darstellt, entsteht durch die Oxidation von Ib mittels Bleidioxid. Sie nahert sich in ihrer Wirkung dem /3-Karotin. Die Verbindung IV ist gegen weitere Oxidation im neutralen Milieu bestandig. Es wurden die Umwandlungen von Ib und Ic im Hinblick auf die Prozesse, die wahrend der Alterung von stabilisierten Polyolefinen verlaufen, verfolgt.