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Bond lengths [pm] and bond angles [°] of the cluster cores of Zr4 and Zr4Piv (the atom numbering refers to the structure of Zr4Piv).
| Bond | Zr4sym | Zr4asym | Zr4Piv | Bonds | Zr4 | Zr4asym | Zr4Piv |
|---|---|---|---|---|---|---|---|
| Zr1–O1 | 205.2(5) | 205.6(4) | 208.8(9) | Zr1′–O1–Zr2 | 122.6(3) | 123.6(3) | 117.5 (9) |
| Zr1′–O1 | 211.2(3) | 217.3(6) | 207.6(2) | Zr1–O1–Zr2 | 132.1(9) | 122.9(1) | 134.5(4) |
| Zr2–O1 | 206.5(2) | 203.0(1) | 201.9(1) | Zr1–O1–Zr1′ | 104.5(6) | 104.8(4) | 106.2(2) |
