Prime Minister Malcolm Turnbull will raise national political donations reform at a leaders' dinner before Friday's Council of Australian Governments meeting, amid a donations row that has drawn in two of his frontbenchers.

But the issue will not be on the official agenda, despite a request from Premier Mike Baird seven months ago.

Political donations reform will be raised by the Prime Minister at a leaders' dinner. Credit:Andrew Meares

Mr Baird wrote to then prime minister Tony Abbott in August, asking that "co-ordinated national reform of election funding laws" be put on the December COAG agenda.

It was raised informally at the leaders' dinner, but not officially discussed.