Cyclobutadiene (and Its Higher Homologues) Complexes of the s-, p-, d-, and f-Block Elements

Cyclobutadiene (and Its Higher Homologues) Complexes of the s-, p-, d-, and f-Block Elements Full article

Journal

Organometallics
ISSN: 1520-6041 , E-ISSN: 0276-7333

Output data

Year: 2026, Volume: 45, Number: 20, Pages: 2375–2403 Pages count : DOI: 10.1021/acs.organomet.6c00214

Authors

Lee Vladimir Ya. ^1,2,3,4 , Ananikov Valentine P. ² , Egorov Mikhail P. ² , Syroeshkin Mikhail A. ²

Affiliations

1	Shenzhen MSU–BIT University (SMBU), Shenzhen, Guangdong 518115, China
2	N. D. Zelinsky Institute of Organic Chemistry RAS, 47 Leninsky Prospect, Moscow 119991, Russia
3	Saitama University, Shimo-okubo, Sakura-ku, Saitama, Saitama 338-8570, Japan
4	University of Tsukuba, 1−1−1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan

Square-planar triplet cyclobutadiene is intrinsically unstable, given its four π-electron configuration leading to unavoidable antiaromatic destabilization. One effective way to stabilize cyclobutadiene is through its incorporation into the coordination sphere of an element capable of electron donation. Metals (main group metals, transition metals, lanthanides, and actinides) are most frequently used as electron-donating elements, although recently, it was established that the main group elements may also serve as capping donors in cyclobutadiene complexes. The recent advances in the chemistry of the cyclobutadiene complexes of the s-, p-, d-, and f-block elements are briefly summarized in this review.

Lee V.Y. , Ananikov V.P. , Egorov M.P. , Syroeshkin M.A.
Cyclobutadiene (and Its Higher Homologues) Complexes of the s-, p-, d-, and f-Block Elements
Organometallics. 2026. V.45. N20. P.2375–2403. DOI: 10.1021/acs.organomet.6c00214 WOS Scopus OpenAlex

Submitted:	Jun 16, 2026
Accepted:	Sep 15, 2026
Published print:	Oct 8, 2026
Published online:	Oct 26, 2026

≡ Web of science:	WOS:001897874000001
≡ Scopus:	2-s2.0-105054498117
≡ OpenAlex:	W7220907714