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Moldova–Ukraine relations are foreign relations between Ukraine and Moldova. Ukraine opened an embassy in Chișinău in and a consulate in Bălţi in 2005. The Ukrainian ambassador in Chișinău is Serhiy Pirozhkov. The border between Moldova and Ukraine is 985 kilometers. Ukrainians are the second largest ethnic group in Moldova after ethnic Moldovans. Both countries were former republics of the Soviet Union.
Relations between the Moldavian Principality and Zaporizhian Host developed in the context of the political situation in Eastern Europe: Polish-Lithuanian states, the Great Muscovite principality, Ottoman Empire, and its vassals – the Crimea Khanate, Walachia and Transylvania. Since Moldavian Prince George Duca (1681–1683) came to control the "Turkish Ukraine", the Zaporozhian - Moldavian relations took one of the most important places in foreign and in domestic policy of Moldavian Principality.
Ukraine, step by step after 2005, conceded several important economic privileges to Moldova. Kiev accepted gas delivery to Moldova for the account of the Ukrainian share in the beginning of 2006 and electricity delivery at low tariffs. Ukraine has also accepted the introduction of the monitoring commission of the European Union at the Ukrainian-Moldovan border, as well as implementation of the unified customs procedure for the Transnistrian part of the Moldovan border. Ukraine opened its alcohol market for Moldovan production when Russia imposed a ban on it.
Nevertheless, certain areas remain with unsolved problems. Since 2006 Moldovan authorities have not delivered to Aerosvit the authorisation to operate daily flights to Chişinău. The rail transport remains an important issue, as Ukraine is constructing a new railway line to deviate from the problematic Transnistrian sector, with its frequent blocks of railway transportation. Moldova has not yet transferred to Ukraine the Odessa–Reni highway section, as well as bordering property in the region of Palanca.
Palanca is a marshy area that could become a Vennbahn-type enclave of Moldova surrounded by Ukraine. Under a 2001 treaty between the two nations, Moldova is to transfer to Ukraine not only the asphalt (as it has already done), but also the real property under 7.7 kilometers of road (which is a portion of the 300 km road between Odessa and Reni), and to clarify the sovereignty of that land, which under that treaty is to be transferred to Ukraine.
The situation remains unresolved with one block of the Kuchurgan power station, as it considered to be on Moldovan territory today for unclear reasons, or at least contested by Ukraine. The construction of the oil terminal in Giurgiulesti is strongly contested by Ukraine for the ecological threat it represents to the Danubian region of Ukraine. Ukraine had transferred 400 meters of the Ukrainian bank of the Danube to Moldova in 1997, in order to make the construction of the terminal possible.
- Moldova-Ukraine relations, interview with Andrei Popov