Reaction of CrCl 3 (THF) 3 with 3 equiv of R-M [R ) Me 3 CCH 2 (a), Me 3 SiCH 2 (b)] afforded either the previously reported tetravalent homoleptic R 4 Cr (1a, b) [M ) MgCl] or the unprecedented divalent and tetranuclear homoleptic [R 2 Cr] 4 (2b) [M ) Li]. Both types of compounds display a remarkable chemical inertness toward proton transfer agents but readily react with ethylene.

Metastases of breast ILC to atypical sites might be more frequent than previously reported. Clinicians should keep a high level of suspicion when a patient with a history of ILC develops digestive symptoms. It is important to differentiate metastases from a primary GI tumor by using immunohistochemical markers. J. Surg. Oncol. 2016;114:543-547. © 2016 Wiley Periodicals, Inc.

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