Molecular structures of (a) 1a and (b) 1b with heteroatoms labeled, all atoms as 50% thermal ellipsoids, and hydrogen atoms omitted for clarity. Selected bond distances (Å) and angles (deg): (a) Cu1-N1, 1.9194(17); Cu1-N2, 1.9153(17); Cu1-Ge1, 2.2138(4); N1-Cu1-N2/N3-Ge1-N4, 44.03(7). (b) Cu1-N1, 1.956(3); Cu1-N2, 1.938(3); Cu1-Ge1, 2.2492(4); N1-Cu1-N2/N3A-Ge1-N4A, 88.15(21). For 1b, only one conformation of the disordered N(SiMe3)2 groups is shown.