Accepted Manuscript Preparation and characterization of [H 2 -DABCO][ClO 4 ] 2 as a new member of DABCO-based ionic liquids for the synthesis of pyrimido[4,5-b]-quinoline and pyrimido[4,5-d]pyrimidine derivatives Farhad Shirini, Mohaddeseh Safarpoor Nikoo Langarudi, Nader Daneshvar, Negar Jamasbi, Mahsa Irankhah-Khanghah PII: S0022-2860(18)30215-1 DOI: 10.1016/j.molstruc.2018.02.069 Reference: MOLSTR 24891 To appear in: Journal of Molecular Structure Received Date: 6 January 2018 Revised Date: 15 February 2018 Accepted Date: 15 February 2018 Please cite this article as: F. Shirini, M.S.N. Langarudi, N. Daneshvar, N. Jamasbi, M. Irankhah- Khanghah, Preparation and characterization of [H 2 -DABCO][ClO 4 ] 2 as a new member of DABCO- based ionic liquids for the synthesis of pyrimido[4,5-b]-quinoline and pyrimido[4,5-d]pyrimidine derivatives, Journal of Molecular Structure (2018), doi: 10.1016/j.molstruc.2018.02.069. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.