The Nuclear Quadrupole Resonance of the 6365Cu Nuclei in Copper (I) Complexes*

Copper (I) occurs in a variety of systems of current interest. It is present in high-temperature supercon­ ductors, but in addition the complexes of Cu(I) are im portant reagents in synthetic organic chemistry, they have interesting photochemical properties, and Cu(I) is an essential constituent of a number of en­ zymes. Twenty years ago our knowledge of the chem­ istry of divalent copper, Cu (II), was far more extensive than that of Cu (I) but recently there has been a rapid development in our knowledge of the Cu(I) chemistry, which has turned out to be particularly versatile.