Table 1. Selected Bond Lengths (in Å) from Crystal Structures.

distance	1b	1-PdCl2	2	3	3-Cl2
M–Te		in-plane ring 2.5488(11)	2.8594(9)	2.5892(9)	2.6875(10)
		perpendicular ring 2.5719(7)
M–N (the closer nitrogen)			2.167(4)	2.060(9)	2.115(8)
Te–N (the closer nitrogen)	Te21–N22 2.760(5)	Te21–N22 2.777(5)	3.119(4)	2.568(9)	2.656(8)
	Te21–N24 2.766(5)	Te21–N24 2.733(5)
M–Cl		2.3306(18)	2.3457(14)		2.320(3)
		2.3373(15)	2.3465(14)		2.336(3)
Te···N (the distant nitrogen)	Te23···N22 4.202(5)	Te23···N22 3.886(5)	3.397(4)	3.372(9)	3.485(7)
	Te23···N24 4.176(5)	Te23···N22 3.858(5)
sp2-linked metallacycle/tellurophene	tellurophene	tellurophene	rhodacycle	platinacycle	platinacycle
M21/Te21–C1	2.080(6)	2.126(6)	2.050(5),	2.000(11)	2.030(10)
M21/Te21–C4	2.097(6)	2.129(6)	1.945(5)	2.020(11)	2.071(9)
C1–C2 (CαCβ)	1.392(8)	1.364(8)	1.396(7)	1.399(16)	1.361(12)
C2–C3 (CβCβ)	1.406(8)	1.398(9)	1.409(7)	1.414(16)	1.411(13)
C3–C4 (CαCβ)	1.379(8)	1.364(8)	1.377(7)	1.361(15)	1.374(13)
sp3-linked tellurophene
Te23–C11	2.068(6)	2.104(6)	2.101(5)	2.113(11)	2.131(9)
Te23–C14	2.061(6)	2.122(6)	2.098(5)	2.130(11)	2.103(10)
C11–C12 (CαCβ)	1.367(8)	1.334(9)	1.334(7)	1.323(14)	1.330(14)
C12–C13 (CβCβ)	1.386(9)	1.428(9)	1.423(7)	1.452(14)	1.447(14)
C13–C14 (CαCβ)	1.368(8)	1.345(8)	1.353(7)	1.311(14)	1.326(13)