Table 4. Metal–Metal Contributions to Peaks in D(r) for (Cu_1/2Au_1/2)CN and (Ag_1/2Au_1/2)CN^a.

r/Å	metal···metal relationship at distance r	arrow shown on Figure 5
∼3.35	M···M nearest neighbors within a layer	a
∼4.96	Cu–N≡C–Au along the a chain	b
∼5.18	Ag–N≡C–Au along the a chain	b
∼5.80	M···M next-nearest neighbors within a layer	c
∼5.98	Cu/Au···Cu/Au nearest metals in adjacent chains lying above and below the layer	d
∼6.17	Ag/Au···Ag/Au nearest metals in adjacent chains lying above and below the layer	d
∼6.70	M···M next-next-nearest neighbors within a layer	e
∼7.70	M···M in next-next-nearest chains lying above and below the layer	f

^aM···C and M···N correlations are also significant; for example, peaks observed at just over 4 Å involve only correlations of these types. Such correlations also make contributions to some of the peaks assigned above and need to be included to calculate D(r).