It opens the way for complicated talks to find a viable alternative.
'I am obliged to fulfil my constitutional duty. This has been long expected, but for me it is extremely sad,' chairman Arseniy Yatsenyuk told the chamber.
I officially declare the coalition of democratic forces ... in Ukraine's parliament dissolved.'
The coalition had been made up of forces led by President Viktor Yushchenko and Prime Minister Yulia Tymoshenko.
The pair were allies in the 2004 revolution but have since become bitter rivals.
