Expeditious access to the most easily ionized closed-shell molecule, W2(hpp)4.
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.
Cotton
F Albert
FA
Department of Chemistry, Laboratory for Molecular Structure and Bonding, PO Box 30012, Texas A&M University, College Station, TX 77842-3012, USA. cotton@tamu.edu
Donahue
James P
JP
Lichtenberger
Dennis L
DL
Murillo
Carlos A
CA
Villagrán
Dino
D
D004563:Electrochemistry; D011743:Pyrimidines / Q000737:chemistry*
D011743:Pyrimidines; C030986:pyrimidine