- Expeditious access to the most easily ionized closed-shell molecule, W2(hpp)4.
Expeditious access to the most easily ionized closed-shell molecule, W2(hpp)4.
Journal of the American Chemical Society (2005-08-04)
F Albert Cotton, James P Donahue, Dennis L Lichtenberger, Carlos A Murillo, Dino Villagrán
PMID16076168
ABSTRACT
A new synthetic path, far superior to either of those previously available, to the W2(hpp)4 molecule (Hhpp = 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine) is reported. The reaction of W(CO)6 with Hhpp in o-dichlorobenzene at 200 degrees C produces W2(hpp)4Cl2 in a one-pot reaction in over 90% yield. This compound is stable and easily stored for further use, and it can be efficiently reduced in a one-step reaction to the title compound W2(hpp)4.
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