Unsuccessfully, it seems:
"Iran sticks to nuclear enrichment
Iran denies it wants to build nuclear weapons
Iran has rejected a European offer of trade concessions and nuclear technology in return for a suspension of its uranium enrichment activities.
An Iranian spokesman said the proposal from Britain, France and Germany was unbalanced and unacceptable.
The UN's nuclear agency, the IAEA, has given Iran until the end of November to suspend its enrichment programme.
Iran says the programme is purely for peaceful purposes, but the USA accuses it of developing nuclear weapons.
"The European proposal is their preliminary proposition and is not definitive, but it is unbalanced," Foreign Ministry spokesman Hamid Reza Assefi said.
He told reporters that the negotiations were continuing, and would resume on Wednesday with the Iranian part putting forward its own counterproposals.
UN sanction threat
The deal has been put forward by three European countries: Britain, France and Germany.
It asks Iran to suspend its uranium enrichment activities in return for incentives and alternative nuclear technology such as a light-water reactor, according to leaked reports.
Closed-door talks between the three European countries and Iran, took place earlier this week in Vienna, in what an Iranian spokesman described as a good atmosphere.
In his comments to reporters on Sunday, Hamid Reza Assefi said that a lasting or unlimited suspension of nuclear enrichment activities would not be acceptable to Iran.
But he underlined that this was not the issue in the negotiations.
European diplomats have said that if Iran rejects the deal, most EU countries would back US proposals for the UN Security Council to impose economic sanctions on Iran.
So far, two years of investigation by the IAEA have turned up no hard evidence of an Iranian weapons programme. "
http://news.bbc.co.uk/2/hi/middle_east/3948613.stm