Haiti did not recognize the Dominican Republic until 1874.
Sources for area, capital, coat of arms, coordinates, flag, language, motto and names:  For an alternate area figure of 48,730 km2, calling code 809 and Internet TLD: 
The Dominican Republic (Spanish: República Dominicana Spanish pronunciation: [reˈpuβliˌka ðoˌminiˈkana]) is a country located in the island of Hispaniola, in the Greater Antilles archipelago of the Caribbean region. It occupies the eastern five-eighths of the island, which it shares with the nation of Haiti, making Hispaniola one of two Caribbean islands, along with Saint Martin, that are shared by two sovereign states. The Dominican Republic is the second-largest Caribbean nation by area (after Cuba) at 48,671 square kilometers (18,792 sq mi), and third by population with approximately 10 million people, of which approximately three million live in the metropolitan area of Santo Domingo, the capital city.
The Dominican Republic has the ninth-largest economy in Latin America and is the largest economy in the Caribbean and Central American region. Over the last two decades, the Dominican Republic has had one of the fastest-growing economies in the Americas – with an average real GDP growth rate of 5.4% between 1992 and 2014. GDP growth in 2014 and 2015 reached 7.3 and 7.0%, respectively, the highest in the Western Hemisphere. In the first half of 2016 the Dominican economy grew 7.4% continuing its trend of rapid economic growth. Recent growth has been driven by construction, manufacturing, tourism, and mining. The country is the site of the second largest gold mine in the world, the Pueblo Viejo mine. Private consumption has been strong, as a result of low inflation (under 1% on average in 2015), job creation, as well as a high level of remittances.
The Dominican Republic is the most visited destination in the Caribbean. The year-round golf courses are major attractions. A geographically diverse nation, the Dominican Republic is home to both the Caribbean's tallest mountain peak, Pico Duarte, and the Caribbean's largest lake and point of lowest elevation, Lake Enriquillo. The island has an average temperature of 26 °C (78.8 °F) and great climatic and biological diversity. The country is also the site of the first cathedral, castle, monastery, and fortress built in the Americas, located in Santo Domingo's Colonial Zone, a World Heritage Site. Music and sport are of great importance in the Dominican culture, with Merengue and Bachata as the national dance and music, and baseball as the favorite sport.
The "Dominican" word comes from the Latin Dominicus, meaning Sunday. However, the island has this name by Santo Domingo de Guzmán, founder of the Order of the Dominicans.
The Dominicans established a house of high studies in the island of Santo Domingo that today is known as the Universidad Autónoma de Santo Domingo and dedicated themselves to the protection of the native taínos of the island, who were subjected to slavery, and to the education of the inhabitants of the island.
For most of its history, up until independence, the country was known as Santo Domingo—the name of its present capital and patron saint, Saint Dominic—and continued to be commonly known as such in English until the early 20th century. The residents were called "Dominicans" (Dominicanos), which is the adjective form of "Domingo", and the revolutionaries named their newly independent country "Dominican Republic" (República Dominicana).
In the national anthem of the Dominican Republic (himno nacional de la República Dominicana), the term "Dominicans" does not appear. The author of its lyrics, Emilio Prud'Homme, consistently uses the poetic term "Quisqueyans" (Quisqueyanos). The word "Quisqueya" derives from a native tongue of the Taino Indians and means "Mother of the lands" (Madre de las tierras). It is often used in songs as another name for the country. The name of the country is often shortened to "the D.R." (la R.D.)