Structure of hydridotris[3-(p-tolyl)pyrazolyl]boratothallium(I)

High‐Yield Syntheses of Sodium, Potassium, and Thallium Hydrotris[3,5‐bis(trifluoromethyl)pyrazolyl]borates and the X‐ray crystal structure of {hydrotris[3,5‐bis(trifluoromethyl)pyrazolyl]borato} thallium(I)

“…The X-Ray Crystal Structure of 2c. The structure of 2c was determined by Xray diffraction, and an ORTEP view of the molecule is shown in the Figure. The coordination geometry around the T1-atom is similar to that found in the related complexes Tp'""T1 [26], TppTo'Tl [27], Tp(4tB"Ph)2T1 [28], and Tp"T1 [29], the T1-atom adopting a pyramidal geometry with respect to the three bound N-donors N(la), N(laa), and N( lb). The molecule contains a mirror plane, the two symmetry-related TI-N distances Tl(1)-N(1a) (2.724(7) A and T1-N(1aa) (2.725(7) A) being significantly shorter than the third T1( 1)-N(1b) (2.675(10) A).…”

“…Thus, in Tpth'T1 these couplings were attributed to the covalent character of the TI-N bonds in this complex [26]. Furthermore, a significant broadening of the resonances in TppTa'T1 was ascribed to unresolved coupling with '05Tl [27]. However, no splittings due to this isotope were reported for Tp(4'B"Ph)2T1 [28] and Tp'Tl (Tp" = hydrotris(2H-benz[g]-4,5-dihydroindazol-2-yl)borate) [29].…”

Centrosymmetric molecular strings in the hydrogen-bonded structure of 4,4'-bipyridyl–4,4'-thiodiphenol (3/2)

“…In suprarnolecular compounds, the big-phenol 4,4'-thiodiphenol, S(C6H4OH)2, invariably acts as a double donor of hydrogen bonds, with neither O nor S acting as hydrogen-bond acceptors. Thus, in combination with double acceptors of hydrogen bonds, this bis-phenol is expected to act as a chain-building unit (Coupar et al, 1996bFerguson et al, 1997). Similarly 4,4'bipyridyl, NCsH4-CsH4N, generally acts as a double acceptor of hydrogen bonds (Coupar et al, 1996a;B6nyei et al, 1998;Ferguson, Glidewell, Gregson & Lavender, 1999;Lavender et al, 1999;Wheatley et al, 1999).…”

The Structure of Hydrotris(pyrazolyl)boratothallium(I)

“…The structure of 1 is somewhat unusual in the sence that all, but two, other TpTl-structures are clearly built up from molecular units. The two exceptions are HB(3-cyclopropylpz) 3 Tl [5] and HB{3-(4-MeC 6 H 4 )-pz} 3 Tl (pz = pyrazolyl) [7]. The former complex forms a stable tetramer with a perfect tetrahedron of Tl atoms and each thallium atom in an octa-* Priv.-Doz.…”