The Associated Press reports that Rohm and Haas has announced that Dow Chemical does not plan to close the pending buyout deal by the deadline. The two companies have received all required approvals for the closing of the proposed $15.4 billion buyout deal, first announced last summer. Since then commodity prices have plummeted and the financial crisis has beaten down Wall Street, raising questions about the true value of Philadelphia-based Rohm & Haas and whether Dow paid too much.